It clearly indicates that major audience is moving towards crypto. Now if we focus on reasons behind it, then we can conclude that Bitcoin initially launched by the 2008 ending and get on board by Jan 2009. Since launching Bitcoin was always in discussion with its specifications, and its price. It takes 10 years to know people about Bitcoin and other altcoins(cryptocurrencies).
Now as in OP mentioned this year by 2019 over 40m crypto wallets created, these are clear indications of global acceptance and existence.
Surely it will still take time to dream comes true, but it will be futuristic currency and World have accepted it.
Depends what angle your going at hear, it definelty wasn't 10 years for a lot of the community to hear about bitcoin and other crypto-currencies, I know a lot of people in fact that have actually known about it for years.
I think, after those 10 years people are able to have a fair and unbiased opinion of bitcoin (with some exceptions obviously), and we've already seen how the media used to portray crypto-currencies and this has been a welcome change.