No, you have not received the mark here.
It is highly likely that the mark will in some manner be tied into cryptocurrency since that would perfectly fit the description of one being unable to buy or sell without it. It also fits nicely with the statement by St Kosmas that in the coming tribulation people will not even bend over to pick up a piece of silver but would kill each other over bread.
By progressing from metal to fiat to digital currency, to social media, to first barcodes and then RFID, first innocent cow-pox inoculations and then aborted-baby vaccines and soon to be gene editing "vaccines", we are erecting the infrastructure which will be used to install the antichrist and the mark of his rule.
So we must resist and work around using the technologies which are clearly being set up for the purpose of enslaving us. But some random cryptocurrency is not yet the actual mark. I speculate that what is currently going on with Billy will not be the true mark but is our masters overextending themselves to implement something which they are not yet ready for, only to be thwarted and have the real thing come out of left field a little later.
This does not make it okay to get a mark (or an injection made from dead babies). Any tattoo is a terrible idea and we must remember that the scriptural prohibition also exists out of foreknowledge to protect us in the coming tribulation where the mark will no longer quite be a tattoo as we know it (certainly spiritually different and probably also physically). We will have lots of false shepherds promising us that it is okay to get once the real mark arrives. And those gnostics who will assure us that we can just get it externally because it is 'forced' if violence is threatened, but that we can believe internally. This is a lie and taqqiya is not Christian.
I generally avoid cryptocurrency but the international banking system is not really better in any way that matters. The cryptocurrencies are in any case simply being incorporated into existing evils of the banking system in spite of Nakamoto thinking that he could destroy them.
My advice is to be ever vigilant. Draw closer to the Church and the true, dedicated Christians. Reconnect with nature and for your hobbies learn outdoor survival and practical handiwork skills which you may need when things get really bad. Invest your wealth not in banks and stocks but in people and in such physical assets as are needed with your true treasures in heaven. Pray and put all your trust in the Lord. And if it comes to that let not the one who is on the rooftop go back into the house to fetch what is inside.
I think you could keep these crypto-coins but sell them if it worries you. It is better for man to enter into heaven with one hand than to be cast into the fire with both hands. And after all, though the coin itself may be nothing, "Wherefore, if meat make my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend."