How many of you have used Bitcoin for more than just a simple payment mechanism?
I barely use it as a payment mechanism.
-snip-
What you just described is actually a form of payment mechanism too, albeit involving overseas or cross-border transfers.
P.S. Also I have
invested in BTC as a speculative investment too, although many people find that it belittles the original concept.
You are right. But if you are so inflexible in your concept of payment, bitcoin can't be used for more than a funds transfer system. Even multisig (mentioned above) is a funds transfer or payment mechanism.
Actually, there is only one thing that you can do, that is not a fund transfer or a payment mechanism.
Sign messages. lol Signing messages is not related to fund transfer or any kind of payment. You can sign a message to prove you own an account here, for example, or to receive an airdrop.