Honestly, I think it's super super super super hard to explain cryptocurrency and blockchain technology... they are definitely tricky topics to understand.
The way I generally explain cryptocurrency is to compare it to the current situation...
Walk into a shop, buy something with a credit card and the vendor has to wait 3 days to get their money... or you purchase a service and you get 30 days to pay that invoice. This causes cash flow issues as they have to purchase stock or materials.
With cryptocurrency, the transaction leaves my phone, goes to your phone, and you can spend that straight away. This is huge for businesses.
Continuing with this, a credit card company keeps all the transactions in their database that they own. This can and does get hacked. Blockchain technology holds all the transactions on all the servers, so if Bitcoin has 5000 miners, then all 5000 computers need to be hacked at the same time. You've explained it well, but I think following a real world story might make it easier to swallow.
The weird thing is, cryptocurrency wasn't invented to be invested it, it was invented to be quick, low-cost fees, unhackable and transparent.
I hate to say this, but I do think your article needs some infographics to help communicate was is essentially a technical topic... but it's a worthy cause to write about and the more 25-40 year old women that are interested, the better.
I also think you could possibly explain Ethereum better by showing the example of a dude selling his house with a smart contract, or mentioning the trillions of ETH projects like cryptokitties.
Maybe include Moldova's efforts to use blockchain to let people buy and sell solar power amongst themselves or to prevent child sex trafficking... something with a real and interesting solution instead of the more technical applications.
But I really enjoyed your article... I personally would have given it an Elephant stamp of Excellence.