If we are going to examine the case of Bitcoin, it was never really adopted for general payment, most use it as an investment. The Bitcoin supporters would always have to argue that Bitcoin's purpose is not digital cash but a store of value. So if you have ever bought or mined Bitcoin, it is quite unlikely that you would actually use it to buy things.
Bitcoin (BTC) have already abandoned Satoshi Nakamoto's Original Vision - A P2P Electronic Cash System. It is no longer suitable as cash method of payment. Aside from that, the Bitcoin Core developers implemented a new software known as Replace By Fee (RBF) that undoubtedly killed BTC's use case as cash because RBF made it easy for people using Bitcoin to double-spend on Bitcoin network.
Therefore, merchants accepting BTC payments are on a higher risk because an attacker at will could easily double-spend. But this doesn't mean that no merchants would want to accept Bitcoin.
Debunking the Myth "You cannot buy anything with Bitcoin"
Bitcoin may have become more about store of value and long-term investing but it has still become used as payment method to purchase goods online. In fact, you can use your Bitcoin to pay for goods and services in the retailers below.
You can also pay Microsoft with Bitcoin to purchase digital contents like videos and Xbox games.
Travala.com - the world's leading blockchain-based travel booking platform also accepts Bitcoin payments. Travelers can book flights and hotels with their crypto like Bitcoin, Bitcoin Cash, AVA, Litecoin and etc.
We may also add up small businesses that accept BTC payments on either brick and mortar or online business.
You can also watch,
And a woman paying in Bitcoin,
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It would have been nice if we have saved that woman. She could have been paying Bitcoin Cash.