I agree with you that the values of bitcoin been purchased by an investor will increase in the future but the price is what we don't know, the thing is that looking at bitcoin price today and remembering it's price two years back a good investor should be encouraged to buy, bitcoin is not doing bad when it come it's value and price, an investment that rises from $42k to $45k on last two weeks Sunday, and till this moment it continues to hover around and today it is 46k if any short-term investor had taken the courage I think they would have made a good profit though this depends on their input.
One thing about Bitcoin is the higher amount invested will yield better profit but yet not mandatory because of the long term holding, whatever you put must surely return in profits making it enough reason to accumulate more with time intervals, all hands are not equal.
Some people are just watching this events unfolding without making any move, buy now no matter the amount, doing it without stopping will help you because with the recent happening bitcoin is making a good move and I know that no one will want to be left behind.
The sooner we understand not everyone will partake in Bitcoin even after being acquainted with the knowledge, it's obvious humans can be different.
Those who bought at $20k early last year saw opportunity and seized it, when others were seeing fear/crash and today those who took the opportunity are now seen as the heros who has won. For you to see profit in Bitcoin investment you have to make a firm decision, stand your ground even if it means standing alone, that is buying when others are selling and dragging the price down. Don't look at price just keep buying.
I'm still thinking about how most people are crippled enough to see good opportunities and refuse to grab it.
Depending on how they see Bitcoin, some may see it as being a ponzi as per why they choose to sell off during the DIP whereas they never did well to learn or neither having the opportunity like we do here, free knowledge being shared without paying a dime.