You will only get frustrate when all of your coins has no price in the market. Yes, bitcoin is one of the most valuable coin that you should buy or invest all you have to do is always be patience all the time and wait for the right time to sell or to trade when it comes to your coins.
Portfolio of most investors has 60% of Bitcoins at least, and this is just some statistics. Why should it frustrate someone? Altcoins are not going to die (I do not mean shitcoins), and some of them will bring a very good profit.
Agree with that, altcoins will soon to have their time to show great prices, only this time that investors are focusing on BTC investment rather than to reconsider in investing altcoins. We can't blame them for not be in altcoins today cause they never find it more profitable. And holding a lot of BTC for them will actually be working, it maybe there is a change of mind and looking for altcoins.