Thanks, it's what I did. Let's say that the amount is the same you have on a pocket being a tourist in usa or europe. Moving them cost around 1,80usd using the low fee option on the app.

I've now asked to some more people and learn that Muun is using sumbarine swaps and subsising your channel. The higher the fees the higher they need to subsidise. But if you can't a balance suitable for a travel to El Salvador for example, what's the point? 
Muun must come to a solution on this as the fees may increase in the future.

IgnaciobTato

bitcoin

Inbound Liquidity limits in Muun Wallet LN

The current solution would be to free up that liquidity by swapping out some of your lightning sats to onchain. It's best to do this obviously when fees are low. Otherwise if you need a lot more inbound then you'd need to pay for it. I'm surprised if muun doesn't have plans to open big inbound channels for a fee.