I agree with you, in fact, Bitcoin is a currency of such a nature that the more you wait to invest, the more you will fall behind. Every moment is very important to start investing in Bitcoin, invest first if you have money, the more you think about the value, the more confused you will be, because the value is never constant. The time and opportunity that is lost once, never comes back later. So never delay in starting investment, delay means losing time and opportunity. A skilled investor knows the true nature of Bitcoin, that is why a real investor never delays in investing. Whenever he has money to invest, he invests, and they are never afraid of instability, because instability is an opportunity for them. Because they are very sure and optimistic about the future of Bitcoin.
If someone doesn't have a clue about what is bitcoin then forcing them to buy can be a bad idea, what if the price crashed once they bought and you are the one who they will blame you. So guiding them when they realize bitcoin is their path is good but when someone still haven't made up their mind can take their time. Better late than never cause if they do it for wrong reason and faced the loss they might exit the market and will never think about coming back.
So this isn't entirely about the price, it's actually the cause that should drive them to invest, a person who truly understand bitcoin will not be shaken by the volatility so the short bumps and dumps will not likely to alter their strategy if DCAing or whatever they want to practice.
@Findingnemo it all depends on the hope you give to a newbie. Your description already appears to be trading. Only traders introduce their newbies into bitcoin trading and that's the aspect that one needs to make sure that a beginner really understands the venture he or she is going into before investing. Introducing a beginner into investing to Hodl, don't really demand much knowledge of the beginner about bitcoin. It gives the beginner the luxury of time to learn about bitcoin in the process and also helps him not to see bitcoin as a get-rich-soon kind of investment.
Why not advise a beginner to invest and forget about it? By such way the beginner would only invest the amount he doesn't care about and wouldn't worry you about it anytime soon. It's the hope you raise that comes back to hunt you from beginners. Getting a beginner to invest for a long-term would also make the person come back to appreciate you many years later when he finally decides to check his investments. Avoid introducing beginners into trading, no beginner who is introduced into bitcoin would still keep his relationship with you when things go south.