As far as block subsidy, it will likely maintain the value it has now indefinitely. Most people seem to think that the Satoshi will be the smallest denomination forever. It won't. As a matter of fact if a penny is worth anything by the time Bitcoin hits 1 million and 1 dollars a coin, we have a denominational issue. So extrapolating from there the more the value climbs from both inelastic supply and rising demand, the more decimals become commonplace. The blocksize now is pretty much perfectly designed to handle 5000 countries worth of settlement transactions per 10 minutes.
As the incentives of bitcoin kick in at the national level, states that hodle first become more powerful than the nations that encompass them. Making the cultural separations more important and further dividing the current sub 200 countries into more. This also decentralizes mining and distributes block fees among smaller parties. The cost of a large mining op just won't be able to compete with hundred of thousands to millions of individuals running 10TH/s systems at 15-17J/TH.
As far as economic velocity, that never gets handled by an asset layer. That is the final settlement for when the trust of economic actors falls or conflict arises. It is utterly staggering how many billions of transactions happen on the back of "trust me, I'm good for it." With layers like lightning it's more like "Trust the code that you can read for yourself, I'm not going to force close the channel while you're offline with a previous channel state (If I get caught I'd lose all my sats)." Much more complicated but, much less trust is necessary. The restricted block size simply makes securing the network way more cost effective. What do you think is easier auditing every ounce of gold in the world or validating the bitcoin timechain? Now THAT'S security.