So your strategy is simply to just short coins and tokens that already pumped a decent amount, but has no narrative to support the pump? I don't know mate — that's too overly simplistic to work consistently to the point that I'm pretty sure every single trader has thought of this "strategy" when they were just beginners.
But in the end, if you can make it work, then good on you!
I try catch the top then i short then i try to make sure it's not going up i search if any news if not then the large cap altcoin usually not going too high.
The top gainers i'll only short when i think it's top right now instead of choosing binance top gainers i picked etc short and it worked well
What i see is that top gainers can go more higher and not good idea to open short.
Sure when we have more bullish market then i'll try to catch up lows instead of top prices.
If you do trading you have adapt yourself according to market.