Im not sure that btc fees will make it a good tool for international payments. There are other reliable, fast and cheap coins on the market. LTC, for example.
I have been using bitcoin as the only tool for international payments for 2+ yrs but I have never faced a situation to shift over to another currency which could indeed be more or less a clone of bitcoin. LTC for example is a fork or a mere copycat introduced just to prove they are no less than bitcoin but failed in massive adoption. But XMR on the other hand is the only currency which is independent and never relied on bitcoin and had solved various problems which bitcoin faced in 2013. Fast forward to 2018-2020, we are having second layer payment solutions which can bridge the difficulty in daily transactions. If you closely look into the reason for the scalability, you would never move over to another currency once LN becomes mainstream and becomes a must for transactions everywhere.
For instance there were debates on the 10 minute block interval right since satoshi days and it shows that 10 minute should be a mandatory to prevent hard fork and improve decentralization. XMR on the other hand handles the transaction time using dynamic block size and a 2 minute block interval. But there were no reasonable code changes in LTC to prove it is indeed an independent currency.
TBH, Bitcoin is more of an asset than a currency.
If we are accepting the 1 MB block size, 21 million coins, 10 minute interval between subsequent blocks, POW and other features devised by satoshi then we need to accept the fact that bitcoin is a currency rather than a speculative asset. While it's true that many people consider bitcoin's volatility is impossible to be used as a currency, we need to understand that we are living in an inflationary world while bitcoin works for a deflationary economy. On the long term, deflationary economy would possibly prevent poverty i.e government print trillions based on the demand and supply model, hence the trillions are devalued over years if demand is reduced but in terms of bitcoin, it would function exactly the opposite. If every one of the bitcoiner possibly try to live in a deflationary economy, i.e spending bitcoin when we need and saving the rest our way of looking towards our current inflationary economy would change.