Bitcoin (BTC) has a perfect bottom indicator. It's not flashing yet.
CoinDesk
A technical indicator using 50- and 100-week moving averages has historically predicted every Bitcoin bear market bottom since 2015, but it has not triggered.Summary
A simple market indicator involving the 50-week and 100-week moving averages of Bitcoin has successfully identified every major bear market bottom since 2015. Historically, when the 50-week average falls below the 100-week average, it signals a bottoming phase followed by significant rallies. Currently, although the two averages are converging due to recent price volatility, the signal has not yet been triggered, suggesting the bear market may not have fully concluded.
(Source：CoinDesk)