No one thought that we'd experience a price surge of $120k as of 3-4 years back so it's quite conceivable that Bitcoin would peak to greater numbers in the coming years. Secondly, these are all speculations so there's a possibility that come 2030, Bitcoin hasnt hit the $1m mark as they put it or it could surpass it.

If I were to predict Bitcoin price by 2029, it would be around $500-600k and this would be as a result of the post Bitcoin halving event that would have it's lingering effects.

Just my opinion. This topic would suit better in the speculation board.