i usually wait till bitcoin price decreas really hard so i can cash out all my bitcoin while its on high state and buy many bitcoins when the price is too low like last year where it hit atleast 500$ and im thankful because i found bitcoin as a profitable way and legal way and also i found that bitcoin price is constantly raising.
I think bitcoin value wasnt decrease really hard for now because the price of bitcoin is recovering and continue to increase.
That is why i do only collecting bitcoin as many as i can and waiting for the time when i see that i can earn double of the current price of bitcoin.