It's good you diversity your investment, don't focus on one currency. This protects you from big losses. But it needs good monitoring from you. If you see a more profitable altcoin, why not?
Yes I really agree on this one unless you are holding a hundreds or thousands of BTC right now, well if not the only way to increase our BTC size is to trade properly with altcoins, yes I said properly that you could have a plan and search very well before trading so you can avoid any losses. Always put stop loss on your trades.