You mean to say, you have already a crypto stocks, and your asking where do you want to spend for that? Well, if you want a cash money, then exchange it into real money, but if you want to invest it in crypto coin, then go and find good coin, a lots of altcoins now newly introduce in the market that has a cheap price, but it will surely grows for the next hours only or days, but you need also monitored all the time about the price, so that you can sell it when price grows.