The best investment strategy I'd recommend for you is the DCA strategy. DCA means Dollar cost Average. This strategy helps you to spread out your investment over a specific period of time, rather than putting in all your money all at once, this helps you to acquire more bitcoin overtime, it could be on a daily, weekly or monthly basis, depending on your income flow.
When you invest a fixed amount of money at regular intervals, you'll be able to avoid timing the market, which is often the biggest mistake most investors do, and you can equally benefit from the long term growth of Bitcoin without worrying about losing all your asset to a DIP.
Let's say for instance, you choose to DCA $100 every month for a year, you'll end up buying more bitcoin when the price was relatively low and buy lesser when the price is higher which gives you more advantage than trying to time the best time to buy bitcoin.