I'll take $30k as reality rather than $500k and 1M.
We could see it accumulates a large amount in just a manner of time but there is always a limit to it.
When it breaks an amount that is difficult to buy then demands will be slower.
This takes it to another year of slow pace volatility.
It happened this year at around 7k-9k and it stayed there for quite some time.
For the average small investor, the price of Bitcoin has long since become too high to buy some significant quantities - but on the other hand it has become very tempting to sell what it has kept for years. If we look at who is currently investing in Bitcoin, then we see that these are companies and funds that have assets measured in tens or even hundreds of billions of $ - do you think it is a problem for them to buy BTC for $30k or even $50k? Therefore, I think that this trend will not stop just like that, in fact it has just begun and will probably reach its peak next year.
I think next year will be a fight for breaking $30k until December 2021.
From $5000 to $23 500 in one year, and then the whole next year fighting to reach just $30 000 (from the current point of view)? As pixie85 is saying, we are now in the same place we were in late 2016/early 2017 - so while some figures seem unrealistic, one shouldn’t be too modest either, yet here we are talking about Bitcoin.