It's never too late to buy Bitcoin if we're talking about long-term storage. Investing in Bitcoin is just as good as buying gold or real estate, for example. You’re very lucky to have discovered such an opportunity and ended up with such a profit. Still, my opinion is that it's never too late to invest in Bitcoin – study the market, look into strategies like DCA, and you can start gradually if you have the desire and means. But remember, you're responsible for your own finances and investments, and it's always important to calculate all the risks in advance.