Past does not indicate the future, but let's take a look:

AMZN, AAP and GOOGL ten years ago were in the middle of of their multidecade run (and already a dominant multy hundred billion in market cap companies).

In Oct 2014:
AMZN was about $16.2, now 180.8 (11.16X)-28% yearly appreciation
AAPL was about $24.5, now 222 (9.04X)-24.55% yearly appreciation
GOOGL was $28.9, now 163 (5.64X)-19% yearly appreciation

Average: 23.85% appreciation in 2014-2024 period.

Bitcoin had 44% yearly appreciation from 1160 in 2013 till now.
M.Saylor was saying that it had 40% appreciation recently, but will decrease somewhat going forward.

It is entirely possible that he next 10 years bitcoin would slow down to somewhere between 35 and 25% based on the current status and comparing with most dominant companies.
If the number would be 35%, then in Oct 2034, btc would be 1266K and if 25%, 587K (with 926-927K average).
I am not taking into account the halving "schedule"...it very well may be that the peak in the next 10 years would be in 2033, instead,  

These numbers make sense to me...