It wasn't until I bought several thousand dollars worth of computer equipment from Newegg that she finally got it.
Youre overextrapolating. What did she got it? And what does that have anything to do with the masses?
All that happened is presumably she saw that you made gains as a speculator and you spent your gains (because she is married to a cryptonerd so it was basically forced on her). That has nothing to do with any mass adoption phenomenon (other than possibly a Tulip speculation bubble in ICOs). That the BTC is spendable on Newegg is irrelevant. The mass adoption of crypto will not be driven by big ticket item purchases because there are no compelling advantages (and some disadvantages such as the lack of the ability to issue a refund against a scammy vendor), but rather by gamefication of invisible nanotransaction purchases.
My prior comment elaborates.