Recently, I saw someone on the blockchain watching whale wallets and wanted to follow their trades.

I want to give a little cold water: first, figure out whether they are building a position or hedging.
Many "buys" are actually spot accumulation combined with opening opposite contracts, so the net exposure isn't as large as you think;
some are just moving coins from cold wallets to exchanges to do margin trading, which looks like they are trying to dump, but they might actually be rolling over positions.

In the past few days, funding rates have been extreme, and the group is arguing whether it's a reversal or just more bubble squeezing.
Honestly, the more outrageous the rate, the more likely whales are hedging to break even on costs, and if you follow along, you might end up paying funding fees for others.
Anyway, I usually check addresses casually: whether there are changes in derivatives positions during the same period, or coordinated actions across chains or in/out of exchanges.
Otherwise, focusing only on one transfer makes it easy to misjudge… taking it slow is no big deal.