If Revolut blocked bank transfers to an insurance company (Revolut Device Insurance) or top-ups from a competitor (Circle, for example.), sure. Perhaps your claim would be more legitimate.
If Revolut blocks bank transfers to a cryptocurrency exchange or an crypto-related business? I’d say not.
Cryptocurrencies both as an asset class and a method of payment contains higher risk, in terms of the concern over illicit funds entering the global financial system (For KYC/AML purposes.).
:R: has decided to take a proportionate approach towards cryptocurrencies.
It is looking to implement it in its app, but at the same time, is doing it in a phased approach (e.g. No direct wallet–to–wallet transfers.) due to regulatory and legal concerns. This includes not supporting transactions and transfers to cryptocurrency exchanges and crypto-businesses.
Given how much and how many legacy banks and financial institutions have been fined over the last decade due to a lax/light-touch approach towards KYC, it really is no surprise that :R: is taking a considered approach towards this area.
Even the loyalist @Graham has decided to move to Starling. He even spends significant time in the welcome threads welcoming newcomers!