The opportunity cost of spending doesn't disappear when you pay with dollars, and it doesn't become uniquely destructive when you pay with bitcoin. The purchase reduces what remains available to invest; a recurring expense can also raise the lifestyle cost your financial independence plan must support.

Spending bitcoin changes your asset mix unless you replace it. Spend-and-replace can restore the position, but transaction costs, taxes, and timing can make the route less attractive. It also doesn't answer which asset should ultimately fund your spending.

Judge the purchase first: is it necessary or valuable enough to justify the savings and future flexibility you give up? Then choose the payment method based on the actual friction and the portfolio you want to hold. Enjoying money now and protecting future freedom are part of the same decision, but the tradeoff begins with what you buy.