As others have said, BTC is forking which is likely pushing alts down (and BTC up). I'd like to spend some more USD to go into altcoins, but the only way I've bought coins so far was buying BTC via coinbase and then using that to buy altcoins. But since BTC is spiking right now, should I just buy ETH and convert that to altcoins?
If you see BTC going up, and alts going down, and than you got those fees for exchanging money into BTC, and BTC into ETH (fees again) and than looking for those rare Altcoin vs. ETH markets...
Honestly, you allready know the answer. Make a stop-loss order against self stubborness, leave your funds sitting in BTC and sit out those dammned forks. Bitcoin cannot fork forever*) The better times will come.
Cut losses early, move funds into things that are obviously gaining on value.
*) actually I am not sure about that. Maybe Bitcoin's masterplan involves forking forever now?