If those are just non established altcoins, then its always better to convert them into bitcoin and ethereum. However, that won't still guarantee profits especially that we are seeing the crypto market today almost collapsing. Bitcoin and ethereum are very low priced this time, but it won't mean that they are good to sell to stop the losses. It would have been better too if you convert some of your altcoins too into stable coins. That way, you will never struggle this time. But anyways, bitcoin and ethereum are much better than those new projects in the market. So always keep the faith.