Just add that ADA and XRP to Ethereum , Binance and Bitcoin so you are good to go , because you need to Evaluate your holding and diversify so having them with more than 2 coins is lot safer and that is what most people do (counting me also) .
that is 10k and yeah it is enough to have for the coming bull run mate.
Having a few altcoins won't diversify your portfolio, because they mostly have the same risk involved. They might give you a different ROI based on their popularity in the market but they have the same kind of risk. Diversify your portfolio, which means lowering the risk of taking substantial risk if the market goes in the wrong direction. If you have 10k funds then the right approach is to put as much of it into bitcoin as it has the least risk and then ETH in second place because of its historical growth record and a small portion of it in low-cap altcoin that haven't seen any bull season till now.