I would not even see their decision to have bought around $10k as mistake, no one really could see this dip coming and this dip is something that many of us are already used to, we know that there are times where bitcoin would want to make some corrective moves and these are part of the risk that we talk of in cryptocurrency investment which we must have built our minds towards, which should help us not to panic once our mindset is built towards this.

The price will surely bounce back to the $10k and the only regret I think that we can have is that we could not put money at the $10k to make some little cash when the price goes back to $10k, but that is for trader, for long term investors, there should be no regrets as the price will be far higher than even $20k in future.