if you want to invest 1 bitcoin, my suggestion is to divide your capital in several exchanges, if one day the exchange is problematic you don't lose all your money, although the exchange has a good reputation, we must remain careful of the assets we have.
The 1 Bitcoin is a huge amount of money so we must think many times before we proceed with it as it's hard to earn that money in real life. So for me if I do have that kind of money, won't invest all in Bitcoin, maybe around $2k only for Bitcoin and $2k for Ethereum and the rest would just rather save it as my emergency fund.