Since Bitcoin has become a dominant cryptocurrency online,
if you are talking bitcoin among all the other cryptocurrencies the it has not "become dominant", it always was dominant, nothing has changed! altcoins are still the same useless things...
if you mean generally compared to other online moneyz like paypal for example or credit cards (generally the online payment methods) then bitcoin is far from dominant. it is still the best but not that many are using it yet.
would you say that Satoshi had foreseen Bitcoin becoming a major currency today? Any speculations as to what or who were his/her influences in creating Bitcoin?
since Satoshi could fly and also see the future at the same time, he predicted today whilst flying over Atlantic.