Hey! It's really never too late for investing in Crypto market. You are probably at the right place my friend! You'll definitely fetch yourself some good returns if you invest tactfully and smartly. It's just that you need to be very well acquainted with the market and for that you need to explore the market well.
According to me Bitcoin is the most lucrative option to invest your free funds. It's gonna get you the maximum possible returns on your investment. Well we have seen a dip in price lately but for sure an upsurge is awaiting Bitcoin. So it's the perfect time to make an investment over here. Then you also have other options like ETH. You won't regret here either.
All I would advice you is just be patient and study the market carefully.