Well, it went from 5 cents (or whatever) to 66K. Even if it triples from here in the next X months, the statement is still true, MOST of its move has already happened.
My biggest investment holding is bitcoin btc and I agree with you that I do not think it can do another million % in our lifetime. It's possible, but not probable. If may happen in our children or grand children's lifetime, though
You have to acknowledge that with less reward also comes less risk
Bitcoin when it was 5 cents was a project and experiment in its infancy. Even when it was at $100, it was still a high risk but not as much as when it was at 5 cents
If you want to have full details on the above paragraph, read the books "Digital Gold" and "The Bitcoin Billionaires"
Now,
bitcoin carries the least risk of all the crypto assets
Do I even have to mention that bitcoin is on CME futures, bitcoin etf in Canada and Europe and bitcoin futures etf in the US, PayPal, Square, JP Morgan, Morgan Stanley, Goldman Sachs, Fidelity, Robinhood, Coinbase, Gemini, Kraken, and on AND ON
Less risk = less reward is a concept that should be second nature to everyone here on ET
If you want to go out on a risk curve and make life changing rewards (profits), there are many projects that have done it in the past year