It's quite difficult to predict because of the unstability. Though the Monero price prediction would be around $150 by the end of this year. And might even reach $500. You never know as the market of crypto is so unstable and highly volatile.

Selecting a wallet depends on your requirements as there're various kinds of wallets available. But the most important factor should be safety. As once your crypto is gone, there's no getting it back.
There are numerous Litecoin wallets and some of the reliable ones are:
Ledger Nano S - This hardware wallet is the best wallet till date and is virtually unhackable. Its 2-FA and its stronghold on the private key makes it quite secure and you can freely rely on it.
Trezor - This hardware wallet supports 1000+ coins and tokens. Trezor is one of the most trusted wallets, is portable and can definitely keep your cryptos safe.
Guarda - This multi-currency online wallet is operable on both mobile as well as on a desktop. It has user-friendly UI apart from being reliable and safe. Guarda provides privacy, as it does not store private keys, or wallet information, or even the user's personal data.

Litecoin Halving is the halving of miner reward which is done to limit (indirectly) the supply of the crypto and hence reduce the inflation rate in the market. The supply reduces indirectly as there are less number of newly generated coins that flow in the crypto market. When the miners are rewarded, they sell their reward (newly generated coins), so as to equalise their expenditure on the mining process (mining rigs, electricity consumption, etc).
There is a general fear among some people regarding this whole Litecoin halving ordeal. But worry not, as this will actually improve the Litecoin market. By indirectly reducing the supply, the coin inflation (in an ideal situation) will go down, and hence the value of Litecoin will increase in terms of fiat currencies.
Some of the basic features of Litecoin Halving are:
 1. The mining reward will become 12.5 LTC
 2. The halving will occur in Aug' 19 (most probably 8th August)
 3. Total LTCs to ever be produced is 84,000,000
 4. Total LTCs in circulation is 62,010,275
 5. LTCs generated per day is 14,400
 6. Percentage of LTC mined is 73.82%

But again, these results will occur in an ideal situation. Nothing can be said for sure as the cryptocurrency market is highly volatile, and the results mentioned above should technically happen.

Since the beginning of May 2019, the price of Ripple has kept on increasing, currently standing at $0.433835 USD. This year has seen a lot of fluctuations for XRP. So, ripple price prediction is quite difficult to understand.

Bitcoin has once again joined the bullish trend with its price surging to $9000 and upwards, you never know what will happen. The Bitcoin price prediction has to be closely watched for those who want to trade and want to gain profit from this bullish surge.

Even if Litecoin and Bitcoin are very similar, there are several distinct differences between them, for instance:

• Litecoin uses Scrypt algorithm as its proof-of-work model, whereas Bitcoin uses SHA-256.
  
  • It takes less time to mine LTC (2.5 minutes, compared to BTC's 10 minutes).
    
    • When it comes to transactions, Litecoin is cheaper than Bitcoin as the transaction period is much shorter than that of BTC's.
      
      • The coin limit of LTC is 84 million, whereas with BTC it's just 21 million.
        
        • BTC's block reward is 25 BTC, while LTC's is 50 LTC.
          
          Litecoin has been in the crypto market for some time now and has garnered popularity as well, being the sixth largest crypto. The reason behind this is due to its simplicity, stability, faster and cheaper (almost zero cost) transactions, etc. So, by converting litecoin to bitcoin on any exchange, you'll be able to see the difference between both of the coins.

Atomic Wallet - This wallet is quite easy to use, being user-friendly and even beginners can use this easily. Atomic is an online wallet that is operable on both mobile and desktop as well.

Guarda - When it comes to online wallets, Guarda is one of the most reliable multi-currency crypto wallet. This wallet provides privacy too, as it does not store private keys, or wallet information, or even user's personal data.

The official wallets of NEM are NEM NanoWallet, NEM Mobile wallet, etc.

There might be many online wallets and many of them might be safe, but the safest option is always a hardware wallet, no matter what. It's important to remember this because if your coins aren't safe, then there's no point in investing and/or trading, as once your coins are gone, there's no way to retrieve them back. Ever!

Trezor - This hardware wallet supports 1000+ coins and tokens. Trezor is one of the most trusted wallet, is portable and can definitely keep your cryptos safe.