> the Bitcoin-denominated price of your services (just to use an example) rise and fall by 400% in a year
Yeah its a bad example because thats not whats happening at all. Criticisms are possible but yours are so far off that I guess these are called weak strawman arguments? I don't think this was intentional as its seems more like a precompiled argument that isn't really a response to this situation so I will tell you my experience with international vendors:
When legal contracts are executed a payment method and pricing index is determined. The payment itself does not take a year and there is usually no catalog of goods and services that are "bitcoin-denominated", for our agreements. When the actual payment occurs we use the agreed upon index to use the dollar price, paid in crypto and this takes a few seconds to execute and even in the volatile crypto markets usually nothing is happening in this time frame.
The cryptos typically involve:
Bitcoin most frequently using Tradeblock's XBX index, or CME's index, or Coinmarketcap
Ethereum most frequently using Coinmarketcap, and lately Tradeblock's ETX index
random token that one of us has large consolidated ownership of
stablecoin like DAI, USDC, Tether
This is conceptually no different than any legal contract that use shares for payment. You get a glimpse of this common transaction method when companies are acquired for "cash and stock". For the recipient, it is all about the tolerance of liquidity.
There is a curve of liquidity for different asset classes, with US treasuries and non interest bearing dollars being the most liquid on the planet, and a different velocity of liquidity needs for recipients.
In a different use case that uses stablecoins there are no price fluctuations and no index price negotiations involved.
Its been more convenient for some of our non-US businesses because it is difficult for banks to open bank accounts when the beneficial signers are Americans. This is due to FATCA and the high compliance burden for non-US banks, as well as FBAR filings for the US person. But the whole concept of bank accounts have been leapfrogged and international commerce continues unabated.