Since I have to report all earnings, will payments in BTC make a problem if I don't convert them to eur and deposit them into business bank account? Anyone has any experience with that? Can I do something more to bring attention of the masses to btc? Any solid ideas?
Should I open up an account and register with my business bank account? I'm really unsure about this and really don\t want to be having any problems later on.
If you are going to receive bitcoins in a non-custodial wallet, you can maintain privacy to certain degree and keep btc in the wallet without any worries of reporting earnings. Since it's just a donation, I believe senders won't report those as their expenses so it is possible for your btc transactions to go unnoticed.
[1] However, if you are using Exchange or KYCed wallet then you have to report 'donations' as your earnings because your wallet will link the identity of your business to the bitcoins received. You can still hold bitcoins in a wallet and not convert those to euros, however, in such situation whenever you sell btc, you are obliged to pay capital gain tax as well.
For example,
You received 0.05 BTC worth 750 EUR as a donation on May 19th, 2019. You kept btc in your wallet for 1 year and the value of 0.05 BTC rose to 1000 EUR. Now you sold BTC for 1000 EUR on May 18th, 2020. So, you will report 750 EUR as your business earnings and 250 EUR as your capital gain.
PS: Even if you use non-custodial wallet, people can easily track how many bitcoins you are receiving as donations if you place the bitcoin address publicly. In such cases, it would be better to report bitcoins received as earnings as per
[1].