here's a list on vendors that accept monero.
lets see a similar list for Bitcoin and we'll compare.
Monerica - Monero Directory
Monerica is a directory for a Monero circular economy. Find merchants, businesses, communities, education, exchanges, wallets and other resources.
even if we go with the whole 15k (not 20k)
I'd still say btc is at maybe ~5x the acceptance rate or so.
which
considering ngu and all
is pretty lousy tbh.