NO ONE is pricing their products in Bitcoin and using it as a currency. When you pay by Bitcoin, it is instantly converted into US DOLLARS that the seller uses. You can NOT price things in Bitcoin, it is to unstable.
Most merchants do price according to the exchange rate, but that doesn't mean they don't price goods
in bitcoin. I only give them bitcoin. They only receive bitcoin. Then, they might pay another merchant with bitcoin. They might need to exchange some for fiat, to pay taxes, charges etc., to be complied with the law, but that doesn't change facts. There's a properly operating economy built around bitcoin.
And we're both parties incentivized to accomplish our transaction using bitcoin, because it's cheaper. Various merchants do make a discount if you pay their goods with bitcoin.
1. If you were hired at a job last year, and paid in Bitcoin, and your pay was actually priced in Bitcoin, at a rate of 1 Bitcoin per year, would you still be working

A salary of 1 bitcoin per year is incredible for the countries o_e_l_e_o has mentioned. Even at the current "bear market", $20k/year for a country like Nigeria is very high. Their GDP per capita is $2,396.04
as of Dec 31, 2020.
And $20k per bitcoin is simply a discount, sorry if you don't see it that way. There will be less than 21 million bitcoin in existence, and just in the US there are about
22 million millionaires. There are about 8 billion people on Earth. If bitcoin was meant to be allocated equally, each person would be accounted with less than 0.002625 BTC. Acquiring 1 BTC puts you
way above the average.
Depends. Where do I live? Venezuela? Zimbabwe? Sudan? Turkey? Bitcoin is definitely preferable to their highly inflationary fiat currencies.
Don't forget Russia and Nigeria.