DAG with POW is the future i guess.

I guess you read SPECTRE DAGLabs white paper. (DAG with POW also - smart contracts are also possible...but they can't have clean txs ordering)

About IOTA  : The validation of Tx is performed in probabilistic manner. The protection against Sybil Attack is relying on the fact that many wallets are "half connected to the internet" (either periodically or continuously with low bandwidth : IOT). These half connected wallets are representing a throughput of tx/sec which is preventing from this attack (*). But this troughput of Tx/sec must represent a significant amount of all the Txs/sec ("significant" ? nobody did the maths behind but I think above 20% (50%?)). So let's wait for adoption in IOT world....but long will be the way.

(*) preventing from this attack because these txs from IOT are considered as honnest and so during attack time they are continuously not approving the attacker txs. So the attacker is alone to increase the cumulative weight of its own txs.

Do you plan to launch something ?