If a crypto is currently trading at $2, and someone has a stop price of $1.8, selling at $1.79. See, when the price hit $1.80, you are forcing the price to go lower. And same happens in the stop market option too. As you are selling at market best price.
Well, that's supply and demand 101. That's why some traders focus on stop-hunting and it's true not only for cryptos but for every asset: Forex, Stocks, … Indeed a triggered stop order does influence the price even more, the less liquidity is in the particular market.
Nevertheless: stops might get triggered and turn around at very that spot … That's the reality of trading. Review your trades and check if you might position your stops too close to a significant area (support/resistance area, trendline, …) and if you can safely widen the stop without increasing your risk too much for your next trades. But my rule #1: never open a position without a stop and my rule #2: when a trade is active, I'm only allowed to narrow a stop, but never, never, never ever widen the stop.