Right now, taking into account the high value of BTC is probably a good moment for anyone that has investments to diversify with some altcoins. Not only with the main ones, people should start to purchase/mine some small amounts of the altcoins that are extremely low in value but have a good volume. With a BTC high, even if it doesn't crash we will see some corrections on its value that could be used to gain a porfit in the altcoin exchange.

And always keep some of the interesting alts as long term investments. You don't really need grat amounts of BTC to do this, just around fifty thousand satoshis will do. You never know their value in one year or two.