They were concerned that if the internet were to go down today I would lose all my investments.?
The internet going down is almost impossible
there exist no switch or central command that can be destroyed
Even in the face of nuclear weapon the internet would still stand strong
Only the region would b affected not the internet
Anything that brings down the internet
Would be something that can threaten our survival or all electronics
Assuming it shuts down
The Bitcoin blockchain will stop producing new block
But would resume once the internet is back on
The internet is not a want
It's a necessity
Definitely, the goal would b to bring it up if it gets down
In all its unlikely and if it occurs
I believe your investment would be the last thing you would think about.
They also asked why the currency of cryptocurrencies is valued so highly.?
Short answer Bitcoin potential.
Long answer:
Check on the advantages of cryptocurrency and why Bitcoin was created The 2008 bank crisis brought distrust on investors with saving their money in Banks
Bitcoin was able to create a market from that and unlike fiat money Bitcoin itself is limited in supply and inflation resistant .