No big players being left, would mean that all most large players need to get in heavily during 1-2 years or so.  I don't see that happening, even if an ETF gets approved.  And after Wall Street the next round would be countries building BTC reserves... apart from El Salvadore I don't see many moving into that direction, yet.
So I think this after the next cycle peak there will still be enough players that have't gotten in yet.
Of course there could be other reasons for demand drying up, but probably not that all big players are in already.
 
(Btw we haven't even taken into account that BTC can function as a blackhole sucking money out of almost any other investment there is in the world (gold, real estate, overvalued stock market, etc))


Actually, "taking a little off the table whenever we do peak" is great advise but isn't it difficult for you to identify when it happens before your eyes? If not please do me favor and let us know, when you see the cycle peak. Thanks