For example: Whenever you walk into a store, ask if they accept BTC or cryptocurrency etc. ? Even if you know they don't. It primes the cashier or manager to better acknowledge the next customer who asks a question like this and also starts a conversation or beginning to something new.
What would be your idea?
The problem with bitcoin is not advertisment, everyone and thier dogs knows about bitcoin by now, because of its high value and everyone is trying to get a peace of the cake, the real probelm with bitcoin is scalibality, once the network starts experincing high trafic, the transactions starts becoming more and more slower, which than leads to higher and higher miner fees, and that is why bitcoin in my opinion will never become a major payment method that is used by all people, if that is what we want than more and more developpments need to be made so we can avoid high traffic and slower transactions.