The best time is when we high lower lows in 2018 and 2019, which is around $3000'ish.
This also implies pra-2017 where the price was 3 digits and at the end of 2017 the price was surge up to $20k.
I have also heard a person trying to invest $1 everyday into Bitcoin for 5 years and he got really big profit today from his daily routine. So, what OP said is actually true.
People said "
Many a little makes a mickle " and it is actually true on this case.
Anyhow, I'm basing on my experience, I have stocks that I hold for more than 10 years so it's doable. The only thing that might sway people though is that crypto is very unstable and risky because of it's volatility.
Stocks are always a great source of income and I'm also planning to learn stocks as well.