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.
Shorting or Longing should not be a long term strategy. They are particularly used by short term traders who buys and sells within a short period of time like a day or a week. People may try different ways but neither shorting nor holding the Long for too long is beneficial. They should be done when you are sure about the short term price movement.
In my experience even the leverage should be a short term strategy. The best one for long term would simply be to hold onto.