So how to choose the correct investment bitcoin?
I don't know what your intentions are! If you want to invest in bitcoin, or crypto, you must learn about it all, including wallets and use them proficiently. Then it's great to put money in bitcoin at an appropriate time. But remember, to choose reputable exchanges, Binance, Kucoin, Huobi is a safe and easy option to exchange P2P. The rest is "learn, learn more, learn forever" like Mac Lenin. Lol
Learn and keeps on enhancing your knowledge, if you meant investing not alone with bitcoin but inside this crypto industry.
Always bring huge patience and your willingness to take the risk, with this volatile nature inside you'll always see many market movements, some may favor your investment while most of the time it will against your side.
Best thing to do is to make sure that you understand what you're doing and you are willing to accept whatever decision you made.