My question is then, can Litecoin even handle the overflow of new users even with 4x capacity?
Why Litecoin? First of all most could actually chose gold or properties, not crypto.
Then most don't know of other crypto than Bitcoin. Bitcoin has troubles, it clearly needs improvements, but it's still the king. Most will chose it.
And there are quite a lot of altcoins, some will even chose anon coins.
Litecoin has a good blockchain, good block times, and that's basically it. Even Bitcoin is accepted in far too few places. Litecoin has a very small fraction of those. LTC is far behind BTC adoption wise. So.. yeah.. why Litecoin?
Property globally is already in a bubble though... do you think it can go higher? Luxury real estate is losing steam as well. If central banks lose confidence then this will affect the artificial stock market (FED can't even raise rates .25% and they've been talking about it for practically a decade). Last time the stock market crashed it took down real estate. The comex is a complete scam and they will not let PM's skyrocket. It would literally take China instituting an actual physical trade market with real pricing when exchanging REAL metal rather than paper IOUs.
Crypto currently doesn't have circuit breakers (and trades 24/7) unlike all other markets. My theory is that once BTC exceeds its ATH it's in unknown territory and only whales can stop its accession. If the cross-over on the ATH occurs during an event like a bank bail-in, then BTC price could go full retard. If this occurs then alts should see a boost, but if this chain reaction of bank defaults spreads then who knows what the future holds.
Would take the entire crypto market to handle all the potential users if something like that happened. And yes, your average person around the world doesn't give a shit about crypto now, but if they see BTC go up 30x again while everything else is falling, you bet their ass they will.
In 2011 I would tell my gold bug buddies about BTC and how it was a better gold. They didn't give a shit until they saw it outperforming their PM's and now they're all interested.