I’ve read it can support a lot. As of today 180 transactions per second have been tested. This DAG algorithm is amazing and it has huge potential.
On the other hand I am concerned with the happened actions as a result of October attack on some wallets. The dev team took over the funds of the IOTA users. I understand that was done to protect the users and the funds are being returned to the customers as we speak. But the main concern is that is it practically possible to take funds away from any IOTA user. Theoretically bad people can simply get your money. Single developer can become bad person or somebody will extort information from developer on how to do this, those are not matter in the context. What matters is there is an ability to steal money from IOTA wallets. I think this one item will be limiting factor for IOTA growth to its potential. I think IOTA devs need to let go of this notion and make changes to the algorithm so nobody can take away funds from other users using high access permissions. Only then we will see how IOTA will take over Bitcoin’s fame.