Bro don't be too confident and ignore the advice of users telling to put your money in a safe hardware wallet, do you know that anything can happen to that online wallet and they will size to exist, then what will you do? i think you should be careful about how you trust this online wallet, it will cost you only few dollars to buy a hardware wallet, be wise.
You just told op to ignore the advice of people asking him to buy a hardware wallet and reversed your statement by asking him to spend a small amount to purchase one. Really? Did you even think before writing this illogical post?
What price did you buy bitcoin? If you have profited you can seel it now and buy again when its price goes to lower.
He clearly bought it at a price lower than $10K since he was ready to sell it at that price earlier for a sizeable profit most probably. I expect him to HODL until it reaches the $10K range again later.