Have you understood the plus and minus of investing in Bitcoin? Although investing in Bitcoin probably gives you high profits, on the other hand, investing in Bitcoin is also risky The question is, have you really noticed the risks? If you're doing so, you must know the risk and profit probability, because not all Bitcoin investments will be profitable and promising because of some mistakes.
After making this thread, I ensure you, don't believe anyone who gives you help and wants to help you to invest in Bitcoin, never trust anyone although they promise you very big profits that are very enticing, never trust them.
If you are willing to invest in Bitcoin, you must learn first, but what and how Bitcoin investment is. Additionally, you must also understand wallets and also exchanges, both CEX and DEX.
So, you will not really be confused about where the best way to buy Bitcoin and sell it. Because you can search for the top exchanges in Coin Market Cap
https://coinmarketcap.com/rankings/exchanges/.
Choose at least the top exchanges, and then you can save your Bitcoin in your personal wallets, not the online wallet.