It will never be a regret if we are investing in Bitcoin moreover for the long-term purpose because exactly, Bitcoin has a cycle that will bring this coin to its bottom price and then rise up to reach a higher price in the bullish era.
You can't convince all newbie of this possibility, but I know those with experience will do it for the long term.
Many new investors come to invest in crypto, especially in bitcoin. They seem inexperienced and just buy without knowing what the risks are. Even they don't know much about how to store their bitcoin safely so centralized exchange becomes their repository. The FTX case should teach them an important lesson about what's the point of having custody of their bitcoin, so it's not just about the money and possible profit, but also about how one can keep them safe.
What we need to do right now is by getting a much better strategy to hold more Bitcoin investment again because the price right now is still that affordable.
I would recommend experienced people to buy and hold, while I would recommend new people to learn and understand the risks first before buying and keeping. Even though right now bitcoin is still at low price, they shouldn't buy without knowing anything.