No, I would not do that. You're getting free money from the government, getting nice interest and the money is safely there. Keep it there.
Sure, you might buy some steem, bitcoin, eth and it might triple in two months, but it might also became half. No one know how it will go, whereas you're getting nice interest on your son's college money and you can be pretty sure that it will stay like that.
Keep the money in the fund, and if you have any extra money, you can invest that into crypto, but dont touch the fund.