Divine timing...I was just on the verge of going to the bathroom to take a dump and shower before reading this "regular people" thread. (no joke)
I don't know anyone who trades. My only meager connection is this literal website. -- if even, at that.
Trading is gambling. there is no way to sugar coat it. -- So if you tell people you trade your own account...they may look at you snarkly like as if you admitted to them you're a gambling addict.
Retail traders make up a historically very low, tiny percentage of the daily collective volume.
Most of it are professional traders, or fund managers managing macro funds. So that's not a good or healthy gauge to use.
I look at the daily volume for options on the ETF's, Indexes and Stocks
https://www.barchart.com/options/most-active/etfs
I wouldn't necessarily say it's growing or diminishing. It is what it is.
Quite frankly, it should be of little to no concern for me or you anyways. There's more than enough space or liquidity or volume in an ocean or even the smallest of lakes.
Not to sound like a snob or an elitist,
but I don't think I am even interested in knowing or talking to real live other traders. -- Most of them, 99.7%, are losers.

Well maybe the ultra ultra successful one's only...like Japanese traders CIS and BNF, and Dan Zanger. and maybe Tim Sykes. and various Trading competition winners.