Forget about age; if someone can make an entry in Bitcoin when the market falls. I think it's a good idea to buy and hold until the market rises and sell in profits, what is not permitted to do is when we invest with an illegal fund, so that we don't bring dirty things into crypto and people begin to see it as something else that supports financial crime, can we always prove being profitable if we can invest by making a suitable entry and also sale in profits when the market pumps, you need to do is to have his coins on a non-custodial wallet after investing.
What if the market did not pump immediately and the $50k was all he has according to him and what the OP had posted? I think he will be forced to sell at loss because he needed money for other expenses.
If the $50k is his savings and it is a money he will not use anytime soon, meaning he didn’t depend on that money and can afford to risk the money, it is good for him to buy Bitcoin now that the price is even down, because even though we have confidence in Bitcoin, we still need to consider some risk managements and also make sure we make the right decision by investing the amount we can afford to lose.
Just because the market is down doesn’t mean that all our money should be used to buy Bitcoin, we should consider our daily needs. They are very important and if not properly taken care off can affect how holding.