Yes, this is financial market and we are all here to make profit, so taking profit is never wrong and that is happening with bitcoin too. We all know the news about an early investor (from 2011) waking up and selling 80,000 BTC, worth over $9 billion this month, and what guarantee is there that the seller is definitely not Satoshi? Does anyone have proof that Satoshi only owns 1 wallet, and he/she doesn't own any other wallets?
An investor can feel regretful about his take profit in the past at lower prices than in 2025 but the other investors in the same market and even newbies in this market must feel happy with it. It's because there are sellers who sell bitcoins for cheap prices so the others in a same market can enter and accumulate bitcoins with less expensive prices.
The market is like a cycle as a zero sum game, and a fixed total circulating bitcoins. If someone sell their bitcoins, there are others who are able to purchase bitcoins too. If sellers sell cheap, it means buyers have opportunities of purchasing cheap.
Bitcoin will always be number 1 and no one denies that because it is obvious, we don't need to give unnecessary examples to prove what no one disputes.
It will continue to be number 1 in blockchain industry and cryptocurrency market until there is a first ever altcoin succeeds to do things like "Killing Bitcoin" and becomes a first ever successful "Bitcoin killer". I don't think I will witness such an mind-blowing and Bitcoin-killing altcoin in the near future.