I like your thoughts. Similar to the dot com bubble, most companies from that era are dead. However, amazon, google, ebay....are now giants. And the internet has made MASSIVE impact.
Most coins will be dead. I think DEX (decentralized exchanges) will be a survivor. Currently, Bitshares DEX can easily handle ALL Nasdaq, NYSE orders...its got that much capacity. Once Bitshares goes on EOS platform and becomes, BEOS; it'll be able to handle global transactions at a capacity unseen.
I believe owning 100k to 2.5 Mil BTS coins now will have it so that your future generations will bless your name for many centuries to come!
My very long term projection for Btishares is $342 and it is currently $0.05. So, 2.5 Mil coins today would equate $855,000,000 at that target. MASSIVE profits even for lesser number of ownerships. It's a true old turkey hodl.