WordPress is open source. But the user base is very small (I mean how many of your friends have their personal website. 39% of the top 10 million websites use WordPress). Cryptocurrency can be adopted by many more people. Take Brave Browser for an example. Each browser is its own cryptocurrency wallet.

Worst part is that with the involvement of money, developers can seriously focus on contributing without conflicts of interest and without having to worry about their finances. This is one of the greatest strengths of cryptocurrency compared to your typical open source projects that rarely get enough attention.