I don't understand this argument that you should buy things with cash and save your bitcoin.
You can use bitcoin to do both. Simply convert some of the cash you normally use to pay for
everyday items anyway and do it that way. You never have to touch your main bitcoin savings.
Sure there can be some volatility issues using bitcoin as a payment method but over the long run
it balances out and you break even. Because some days the price of bitcoin may be down but
other days the price will be up so over the long run you're not losing anything.
I love your point and your argument to support bitcoin in every little way we can,
but I would want to point you to the direction that funds kept for expenses are not entirely good to be kept in bitcoin since the price movement cannot be predicted and you might end up needing the funds when the price is down which would lead you to a deficit and may lead you to tampering other funds to balance up. Hence it is better you hold funds meant for your expenses in stable coins or fiat and if you are so much of a bitcoin advocate, when you want to use those funds, you can convert them back to bitcoin and spend it.
I already addressed that concern in my OP. Again, if you are only using bitcoin for small purchases
like a coffee or to pay for lunch once in a while then the price movement doesn't matter much.
The price can be up or down at the time of your purchase, but over time the ups and downs will balance out
so in the end you aren't losing anything. If you are really that worried about it you can simply pause spending
when the bitcoin price is down and wait for the price to go back up to start spending again.
I don't consider debit cards that are funded by Bitcoin as paying for something with Bitcoin, that is not. While you are using Bitcoin to fund the card, you are not using Bitcoin to pay for something. Sure it has many benefits, but again that is not it. You are only really paying with Bitcoin, when you are sending Bitcoin to the merchant. I have done this a couple of times, and it always felt great. It is a positive surprise to find someone accepting crypto where you don't expect it to happen.
Nothing in life is perfect. But don't let the perfect be the enemy of the good as the saying goes.
Using a bitcoin debit card still contributes to network activity, helping to strengthen the network.
People may think buying a cup of coffee is such a small transaction that it doesn't do much of anything for the network.
That is the wrong way to look at it. For example, in the US alone there are 50 million individual holders of bitcoin.
If just one or two million of these holders are using bitcoin to buy coffee every week or every month,
that is a pretty significant contribution to the network.