With all the restrictions the OP puts on the question, I'm going to say it's nearly impossible to make this work. It could work for someone who is already wealthy and trying to get more wealthy, as in an eccentric wealthy recluse, but what is asked compared to the OP's current position isn't going to happen. The world isn't set up for that kind of thing, and the only reason a wealthy person can do it is because they already have layers artificially in place to do most of the work for them.
Without an ID, most people won't trust you to mop their floors, which goes at least double when it's an online meeting place. There's a reason people generally don't date people they meet online without at least a pic. I don't accept FB or LinkedIn connections with a generic or lack of profile pic.
Most sales platforms still don't pay out in encrypted currency and you can't pay for 99% of anything with it either. You still need some sort of platform (like a bank account) for conversion.
Murtaza Ahmad has the closest thing to what you want with their #1 and #2, but it's a 50% solution at best. And montefiore's answer could work, if you had at least 6 months to work on it, so it's maybe a 10% solution.
Unfortunately for you, Murtaza Ahmad's #3 is the only way to go, and that needs to include having a photo ID, professional human interaction skills, and the willingness to get out of your comfort zone.
If you have time and money, you could set up or write an encrypted currency transaction processor to help with the massive amount of transactions that are backed up in the current system. The fees you and others pay for transactions would go to you. This takes time to write and debug, as well as get people to use. And it takes money to host on a reliable and secure platform. If I had any interest in encrypted currency, I'd be doing this.
Or, if you still had time and money, you could write a system to take payments from any platform (whether it's Apple, YouTube, Etsy, PayPal, banks, or whatever) and instantly transfer it to encrypted currency like you want. People and businesses pay you in dollars, pounds, rubles, yen, or whatever and all you see is BTC in your wallet. Then, when you pay others (such as your landlord, mortgage lender, car repair, groceries, gas, bus fare, and whatever) and it automatically and instantly translates your BTC back to dollars, pounds, rubles, yen, or whatever. People like you would pay for this kind of system. Even if it exists, it's not mainstream enough for most people to know about it, so you can get on the "ground floor" of this industry, eventually making millions or billions.
But you need time, money, and even human interaction to make either of my suggestions work. Even if you do online advertising, you still need money for that, and you need to know when and why it's not working, so you need human interaction. And even if you spend the money for someone else to do it for you, you still need human interaction for them to know what you want out of the ad campaign.
I got into computers so that I could avoid people. I was hoping to get a job fixing computers in some back room somewhere. That didn't happen. I had to be a service rep, talking to people about what's wrong with the computer. This was true working for small and large businesses as internal IT, as well as when I worked fixing people's personal computers. It still doesn't work as a software dev. I need to work with other devs, managers, Agile product owners, sometimes CxO's, and sometimes outside customers. Since you aren't rich, you can't do all of that through a butler or an associate/representative/secretary.
I'm sorry, but that's the reality of things right now. You haven't found a solution because there isn't one to find at your current level. I'm (finally) making more than decent money right now and it's not possible at my level either. You can make it possible for others to do it, by creating the system from scratch like I outlined above, but that's not going to help you. Simply put, by the time people start accepting your system, you likely won't need it anymore.