LTC and ETH will start the altcoin rally once again. So I would pick them first. But I will not invest in other coins. XRP, TRX has no future and Dogecoin will not be so profitable though I love it. There are so many excellent projects. I would add to the list AVAX, Algo, Theta, Vechain, Zillica, etc. which are better than xrp and trx.