This rally has been weak and protracted. Usually this means the retracement will be deep and rapid. The alt season rallies have extended the BTC relief rally but don't be fooled.
Side note: Alts are almost always the way to trade BTC unless you're trading north of 200k and even then you can diversify into more alts for more risk exposure off the BTCUSD lows. Pick anything you like in terms of fundamentals in the coinmarketcap top 100 and you should outperform BTCUSD consistently.