This is a very common mistakes that new traders make, there isn't always any reserve to fall back on when the trade didn't go as planned and this is always frustrating. As a trader that wants to make it in the market, you should always have some extra money just sitting around that can come in useful when the trade goes against you.
The market is very volatile and things can swing the opposite direction from your initial prediction as quickly as possible. My best strategy is trading coins when they're still new and hyped. I try not to fomo into the market but also not to miss out on a great opportunities to make some money with new listings..
New projects are very interesting to trade as the price is at its vulnerable moment that can either give you huge profit or send you packing after losing. This project has to be great ones and not the shit coins been hyped all over social media.