I'm putting away $300 a month, my question is where to put it. savings account has basically 0 interest, there are HYSA (high yield savings account) that would give me 3-5% apy, or I already have some money in stocks that have grown consistently 25% over the last year (index funds only)

what would you guys recommend? I'm looking to buy it probably 3 years from now. that way either I've got a fat down payment or I can just buy it cash

thanks