it's true that the number of bitcoin wallet users is still very small, but I strongly believe that number will increase over time.
that is NOT number of "bitcoin wallets", that is the number of blockchain.com accounts that people have opened and people should not even use web wallets like this in first place specially since their system is filled with bugs and also because after nearly 2 years they have not yet added the new features added to bitcoin back in August 2017 called Segregated Witness.