I believe bitcoin and ETH had already proved it's worth and was able to achieved such highest mark in the last Q4 of 2017. With this, I think bitcoin is just fine for now and existing fluctuations are just a part of its correction wherein it may regain back from it's dip in the coming months to come. Therefore, btc holders and ETH holders will just have to stay put and need to patiently wait for the recovery that may happen soon.