Came across buy and hold 17% CAGR portfolio backtested since 1987

For context, my portfolio is 100% VT and chill. I came across this interesting leveraged portfolio, backtested since 1987, with the largest drawdown was only -27.89%!

https://testfol.io/?s=3wGHtKUjnI4

Mixture of 25+ Year Zero Coupon US Treasury Index ETF, managed futures, Gold, small cap value stocks, and SPY.

All buy and hold, with yearly rebalancing.

Someone explain why this is/isn't a good idea.