what do you guys think about the MimbleWimble Protocol? is it a good competition to ONION??
I think so. The MimbleWimble Protocol can also be combined with Onion routing for anonymous sending of transactions. A good example is Grin coin. The advantage of the MimbleWimble protocol is that it makes the transaction size much smaller, so it doesn't bloat the blockchain so much in comparison with the other privacy coins, a good example being Monero with large transaction sizes.