Sure saying and i totally agree with that every investors should always have it in mind that they should invest in Bitcoin that can last at least whole cycle or more consistently without having a double mind in the market price because many investors always consider the market price before investing but i want to put it to you that any investors that has the full knowledge on how Bitcoin will never be afraid on how Bitcoin is fluctuating in market but his focus will always be investing consistently.
They may know about BTC, but they wouldn't go into it without examples: some are just afraid it won't work for them, and they fear any dip in their way: however, it's a normal thing with BTC, and eventually, it all pays off tremendously.