Nowadays, many people think about shorting junk coins; achieving a wave of twenty to thirty points is quite easy and indeed very exciting. However, most people definitely lack the courage for this.
But a gentleman does not stand under a dangerous wall; I would rather short Bitcoin, where the certainty is higher. Beware of dead cat bounces with junk coins!
If you really want to do it, you can play an all-in strategy with small amounts, without adding to your position; if you lose everything, then that's it. Just take profits on a wave of dozens of points and look for opportunities to re-enter.