20s tomorrow, page-12

Colorado,

Firstly, being afraid of losing money is natural and a good thing. Secondly always be prepared to lose the lot on any single investment. Therefore if you are investing more than you can afford to lose, diversify over at least 5 or more stocks.
Some stocks have disappeared off the board overnight and that means all your money on that stock has just gone up in smoke.
Assuming you are not dumb, then set a Stop Loss around 30% of your purchase price and sell if the price goes down to this. If you are having a punt like betting on a horse and you can afford to lose your bet then let your bet ride on TON. This is NOT investment advice.
Finally getting to grips with trading takes years. Start off with small investments because you will lose money to start with. While you are learning it is advisable not to invest too large an amount on small cap stocks like TON. I have $65,000 riding on TON but that's because I'm an idiot or going to be very rich idiot.