Remember that every time there's a dip, there is also an opportunity to invest more at a lower price especially to those crypto that is very dominant like bitcoin, ethereum, ripple, and othres. So don't be afraid when your portfolio's value gets down but take it as a chance of having the cryptos that you desired and when it comes back again, i am sure it will give you a very good profit.
Actually the value is not getting down, at least not the intrinsic value. That often increase with time as many projects get new partnerships, launch their main nets or products...and still the prices decline, mostly due to the bear market.
I would try to see it from another perspective...see the bear market as shopping time and do not expect anything to rise. Do not check cmc several times a day, only when you want to invest more and then look for discount..it is marked in dark red.