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In my opinion, Bitcoin is a store of value, not a currency. There may be cryptocurrencies becoming legal tender, but not now, volatility and supply and demand need to be considered.
The intention of Satoshi according to the whitepaper was an electronic payment system without trust but with cryptographic proof of the transaction, which literally means taking away the third party to make the transaction and not a store of value. In my opinion, Bitcoin is a store of value, not a currency. There may be cryptocurrencies becoming legal tender, but not now, volatility and supply and demand need to be considered.
Who knows if Satoshi could have stayed and we could have seen a much different space or whether he knew that the scaling will be an issue and never bothered to come back, but one thing was certain he was not happy with the direction BTCitcoin was going when he left mainly because of Wikileaks and a few other things
.Still if you want to transfer currency you can do it with cryptographic proof and if someone is not intending to do that does not mean that it is just a store of value.