I could see something like $250k-$300k in 2030 and $600k in 2035, and maybe passing $1M by 2040 as being pretty reasonable assuming nothing super bullish or super bearish happens to keep the price down or greatly speed up adoption.
We haven't seen the great adoption yet, I even think in 2035 BTC possibly could've reached $1M.
If you notice current trend, many nations are preparing to adopt bitcoin, when that happens, it will spark domino effect where corporations and companies also adopt them within those countries. That could create chain demand and therefore parabolic increase.
If that happens, that would be huge.