Sure, you might snag a few wins, but in the long run, you WILL get rekt.
Bitcoin is an unstoppable train. If you don't believe in its power, don't hop on.
But here's the golden rule: Never bet against Bitcoin.
Many people will disagree with you because in this market, there are two sides of movements, up and down. There are different times when market will have liquidations on either up or down way, with Short squeeze or Long squeeze respectively.
It's not rare to see both Long and Short squeezes within couple of minutes in this volatile market.
The bottom line is not bet against Bitcoin, I see you meant don't short against Bitcoin, but "Don't use leverage in Bitcoin market, for either Long or Short positions".