Recently, I saw someone use changes in stablecoin supply to "prove" that ETF funds are entering the market. Frankly, the correlation is quite easy to see, but the causality isn't that straightforward. An increase in stablecoins could just be exchanges stockpiling reserves, market makers needing them, or people swapping other coins for U, then waiting on the sidelines... Similarly, ETF inflows don't necessarily mean immediate on-chain buying; sometimes off-chain funds just come in slowly, or people are simply observing first.

I'm now more inclined to treat these as "weather forecasts," not trading signals. The usual approach is still to buy in batches, leave some room, and wait for the sentiment to cool down before acting. (Don't rush to assume that stacking two lines together is a script ready to run.)
By the way, recently retail investors have been complaining about miner/validator income, MEV, and unfair ordering, which is quite real. If this "invisible tax" on-chain isn't addressed, even if the money flows in, people might not be willing to stay long. Anyway, I'll just follow my own rhythm and plant my flowers.