I think montero would be a great option for privacy friendly transactions especially compared to bitcoin

PLEASE DO NOT SUPPORT CRYPTO IN PROTON!
Europe must ban Bitcoin mining to hit the 1.5C Paris climate goal
https://www.euronews.com/next/2021/11/12/europe-must-ban-bitcoin-mining-to-hit-the-1-5c-paris-climate-goal-say-swedish-regulators
It is currently possible to drive a mid-size electric car 1.8 million kilometres using the same energy it takes to mine one single Bitcoin. This is the equivalent of forty-four laps around the globe.

I think you can pay for something with USDT, not just BTC or ETH. On this website https://bitcoinwide.com/, you can find companies accepting different cryptocurrencies and you can find out which coins are popular nowadays as a payment solution

XMR is the way of the future. It's like BTC but better. Please get XMR payments up. You will make more sales.

Sooooooo important to get Monero added. Please get XMR added, it makes no sense to have BTC and not XMR.

Take stable coins as crypto, BTC technically creates taxable transaction in US. Any transaction involving Bitcoin, tokens, Etherium and other cryptocurrencies is taxable in the US according to https://tradecrypto.com

When it comes to large expenditures and purchases with cryptocurrencies, there are several legal ways to avoid them.

In 2019, Bermuda allowed payment of taxes, fees and other public services with USD Coin (USDC).
Belize is the first country where you can buy real estate for Bitcoin, tokens and other cryptocurrency. There are special systems in place to facilitate transactions, and some banks even issue mortgages, including to support bitcoin transactions.
In Panama, bitcoin can be used to pay for investments in exchange for state residency by contributing the equivalent of $20,000 in exchange for a "residence permit for investment in the jurisdiction's reforestation programme". After 5 years of residency, the investor is eligible to apply for Panamanian citizenship. The programme is available to citizens of the EU, USA, UK and other friendly countries.
Similar conditions for residence permit and citizenship for bitcoin apply in Nicaragua, where the entry amount is US$35,000.

Currently we can only pay invoices with bitcoin (if you look for crypto option), i think that should be changed, especially since it's 2021 almost 2022, we need more options, people are using a lot of cryptocurrencies and you only allow one. High transaction fees, slow confirmations... bitcoin is not for that... use some other company for crypto payments which allows more options.

Take stable coins as crypto, BTC technically creates taxable transaction for US citizens. USDC and XCHF (Swiss Francs) would be good choices. Some folks will complain about gas on Ethereum network, but those are on their way down.

Take stable coins as crypto, BTC technically creates taxable transaction for US citizens. USDC and XCHF (Swiss Francs) would be good choices. Some folks will complain about gas on Ethereum network, but those are on their way down.

Bitcoin is no good for transactions! I have thousands in crypto but I can't buy an account with it here!

Can you guys implement crypto payment for VPN/Upgrade mail ...

It's quite surprising and disappointing that the world's leading private email service forces customers to use either PayPal or a credit card, both of which are monitored by countless government agencies and is completely contradictory to the purpose of ProtonMail in the first place.

I was ready to go all in with my personal and business accounts and subscribe but not giving your customers the option to pay with Crypto is unbelievable.

Please respect your customer's financial privacy and give us the ability to pay with Crypto or Bitcoin.

What is IOTA?!-) Add BURST!
But seriously, any crypto with reasonable transaction fees will do. I wanted to get a full account yesterday but when I saw that I would have to pay 20$ worth Bitcoin for transaction fees........!?

yes, IOTA payments would be preferred

Bitcoin is good for storage of value, but there are other good payment options. You would be way ahead of the curve if you accepted IOTA as a payment method. Payments would be free of charge and would take 15 seconds.