with your high rank you should know this already that bitcoin transactions are super fast and network propagates the transactions at highest of speeds.
what you are talking about is confirmation times. and there is a simple solution for that. "add standard fee" it is as simple as that and if you add the correct amount of fee based on the size of your transaction then you can see confirmation in less than 10 minutes and worst case scenario which is rare will be 1 hour.
But what should I do if I want to buy groceries in the supermarket? Should I wander inside the supermarket within an hour? It's a little bit inconvenient.
Of course this could be very inconvenient, both for you and thew store. But that is why Bitcoin debit card exists. Sometimes confirmation could be slow but with Bitcoin debit card transaction is fast and esay like with any other debit or credit card and you can use it everywhere you want. You should try it.