For us who knows Bitcoin for sure that we can easily point out that this is really a great asset to HODL for long term. Its really quiet challenging to convince newbies to think about the same but if we explain it well to them how good Bitcoin is and they also show up some interest on investing on it I guess they proceed on invest then think about upgrading their knowledge to help them to learn more about the investment they made.
Having doubts is normal and what's wrong about this situation if they didn't do any action to learn from what they are currently looking at. If they didn't invest then provably they are the one who's losing the opportunity and if they also have this delaying mindset like waiting for the dip for sure that they realize later on that they are not moving and prone missing lots of opportunities. That's why its recommended to anyone to buy now and accumulate again when you have funds to spend for buying Bitcoin.
Sometimes beginners are still hesitant to invest because they don't have long experience --- then think it's too expensive, then usually they give up their intention to invest in bitcoin because mentally they are not ready, meaning in this case it is natural that beginners must be able to dare to start from the beginning. Because at the beginning it is difficult to do after they do it they will easily invest any amount. Beginners usually need a lot of motivation, don't give them negative things because it can be down for them, as much as possible beginners should know that investing in bitcoin is not for the short term but for the long term with a minimum investment of 5 years and above.