What is causing this pump, and do you expect it will last? I feel quite comfortable holding btc and Dash, for some reason I don't feel comfortable holding much bitcoin cash except for the short term, what do you guys think?
Roger Ver and few other old bitcoinists are always there to pump bitcoin-cash-abc (this is the right and new name of BCH as they also have another fork to have bitcoin-sv). Now, it is being pumped and may get back to its old levels of 0.22 BTC levels too (I always check value in BTC and not in USD). You bought hence you may continue holding as there are people to back you.
I honestly don't know much about it
There is nothing big to explain about bitcoin cash, bitcoin cash is just an hard fork of bitcoin in 2017 that never agreed with the implementation of segwit in the bitcoin network and decided to fork off from the bitcoin network and also increased the block size of the blockchain because they believed that what caused an increase in the fee of bitcoin transactions in 2017 is because the transaction made on the network was so much.