There is no risk in not adopting bitcoin. If you walk into a grocery store someday and they only take bitcoin, it is because the price of bitcoin has become more stable than other currencies, with a smaller spread, more liquidity and a predictable price.
At that point, you take whatever assets you have (skills, labor, stocks, income, real estate, commodities) convert into a little bit of BTC and buy your groceries. Nothing to worry about. You will only need enough to pay your monthly bills.
But your grocer of course will be submitting sales tax to the govt in BTC. That is one way they will know whose wallet is whose.