The most used dapp had just over 4000 users in the last 24 hours, while CryptoKitties, arguably the most famous dapp, didn't even have 400.
Find me a dapp that isn't one of those two things with appreciable usage and I'll be impressed.
Security tokens are a Bad idea.
Dai is basically only useful for speculating on cryptocurrencies and so I dismiss it like I dismiss exchange dapps. This whole industry can't be built on speculating on the value of nonces.
> It's awesome until your private key gets stolen and suddenly a hacker in Russia owns your house.
I like the legal system. The transactions I'm involved with are already cheap and the non-cheap transactions aren't made cheaper with the blockchain.
Might be a bit too early. Don’t know if the market is even close to ready.
Expensive/Slow?
Which only make sense in a very narrow "technically correct" kind of way. From a larger perspective they still don't make sense. Pissing away small countries worth of electricity to validate an incredibly small number of transactions is a horrible idea.
...And that is just one of the deep, fundamental flaws in blockchain-based currency.
When the consistency algorithm is proof of work chains, or when the proof of work is used to control the scarcity and disbursement of the valuable token, only then you have the whole "world turning into fucking Mordor" problem.
So mostly they are gambling apps (with source of randomness the blockchain itself), exchanges, or artificially scarce "collectibles" (like cryptokitties).