All‑in/all‑out ETH trend follower: buy ETH only when it’s above its 200‑ and 50‑day averages and momentum (PPO) is stronger than +2.5%; otherwise hold Tether (cash).

It only owns Ethereum (ETH) in strong uptrends; otherwise it sits in Tether (USDT), a dollar‑pegged coin (cash). It requires: 1) ETH above its 200‑day average 2) Also above its 50‑day average 3) PPO momentum (a fast vs slow average) > +2.5% If all pass → 100% ETH; else → 100% Tether. It switches only when signals change.

ETH trend-following with a crisp all-or-nothing rule: 100% ETH in strong uptrends, else USDT. Out-of-sample: ~17.4% annualized return with Calmar ~0.56. Adds crypto diversification and potential upside to complement the S&P 500.