The problem with most people who invest or trade bitcoin is that they don't have an exit plan, i does not matter if they get in early or get in late, they always get greedy once they see the price rise and don't take their profit while they are still green, so whether its a bubble or not they get caught up in the trend and don't set goals, sure the crypto market is hard to predict and there are always ups and downs but trends can be easy to follow but the key is to stay calm and not to get greedy and have a set goal.
I am also having similar type of opinion like for long term bitcoin trading, definitely we do not need any exit plan because bitcoin is always into bullish trend so you can make the maximum benefit if you continue your holding.
It means you will never need to go for selling your bitcoins but you can use it in your real time to enjoy the maximum benefit out of your bitcoin investments. People who are selling right now maybe regretting later for their decision of not continue their holding. To avoid such regret it will be a better decision to continue our holding.
but if you have other things to attend to other than holding and waiting to increase the value of btc, it is also worth it to cash out some. like for example, if you want to start a small business, and use some of your btc funds. that for me is a worthwhile move. because you can already increase the value if you are good in the business that you venture with. so imo, it depends on the capability of the person how he will tackle his next move with regards to his btc funds. some can gain, while others will lose some.