Bitcoin: the 50-day SMA is Awesome?

So I made a test to see how simply following the position of price compared to a 50-day SMA on BTC/USD.

Results: https://imgur.com/a/ZBHMqcq

It appears that this very simple Long-only strategy has consistently beaten Buy & Hold over time, on a Performance/Risk basis.

The rules I used :

• Buy when price is above the 50 SMA.
• Sell when it is below the 50 SMA.
• Position size : 100% of current capital (started with $5000)

Fees are included (0.10% per side).

I tried a lot of different SMA values, are there are multiple clusters of values that beat B&H when just buying or selling depending on the position of price from the SMA.

Curious to get your feedback on this, thanks!