Hi, I'm from Russia. If you are interested, I will tell you how it works in practice. Forgive me but I can't write in German. In Moscow there are large wholesale markets, where hundreds of tons of goods come. In these markets there are wholesale representatives and also there trade in retail. For example
https://tk-sad.ru This is a very large market, it is profitable for a small entrepreneur to buy goods there, and not to order in China. It is more profitable for business. There are people who can accept payment with bitcoin( in Russia there is still no law on cryptocurrencies, so bitcoin is not banned and not allowed. You can not write prices in bitcoins on the shelves of stores - it is prohibited, but it is not prohibited to change goods to bitcoin. The main thing not to write on the official websites, documentation, etc). There are a lot of companies in Moscow that will deliver cash directly to your office in exchange for bitcoin. It works simply, you call up with the office of the company, you are told the address of the wallet for the transfer, you pay and the courier brings you money. You can spend them in the market. If you are afraid that you will be deceived, then you can come to the office and make an exchange in the office.
I do not advise you to make such transactions with someone without a good reputation.If you buy goods in bulk for a long time, your partners can accept payment in bitcoins from you. But if you decide to buy goods for 100-1000 dollars, you will have to pay in rubles.
No one will accept payment in bitcoins from a stranger.
https://www.bestchange.ru/bitcoin-to-ruble-cash.htmlHere you will find many firms that change bitcoins into rubles and Vice versa.
And personally, I do not advise you to say in Russia that you have bitcoins, it can be dangerous for you. It is better to exchange your bitcoins for rubles from one of the intermediaries or pay with your plastic card, or read this topic.
https://bitcointalk.org/index.php?topic=5181680These services allow you to exchange cryptocurrencies for rubles and pay with them in stores.