Yes, when you talk out someone about Bitcoin investment, you should also tell them about it's cycle. Bull run and bear cycle and how everything operates on those period so it will take time for our money to mature and make that big profits that everyone is like preaching.
I don't think telling them about the bitcoin cycle and relying on it for investment is a good idea. What is the guarantee that the bitcoin cycle will always repeat? Like what is going on, does anyone have proof or assurance that the bull season is not over and prices will continue to rise? Because if we look at previous cycles, we can easily see that the real bull season is coming this year. But does anyone dare to confirm and guarantee?
Instead, tell them that bitcoin is very volatile and unpredictable and if they want to invest in bitcoin, they need to hold it for the long term and should ignore short-term volatiles.
And if I'm the person that is really interested on investing, I will also do my due diligence and study how the market works. I mean it's my hard earn money, so I will have to really understand everything despite what someone is telling me about how to get rich. So it's not like we will rely on others even if they are our relatives or friends teaching me about the benefits of investing into Bitcoin.
My only advice: DYOR, don't trust anyone completely.