In the past two years, the number of BTC and ETH non-empty wallets has increased by 27% and 47% respectively.

Santiment said in a post on X that the number of cryptocurrency holders has increased significantly in the past two years. Here is the number of non-empty wallets for the top four cryptocurrencies by market capitalization:
BTC: 54.70 million (+ 27%);
ETH: 134.90 million (+ 47%);
USDT: 6.57 million (+ 66%);
XRP: 5.75 million (+ 28%).