if you buy top 10-15 coins, don't buy them with leverage
only evident scams can be pumped without corrections
corrections are inevitable and can be deep (Dogecoin currently)
when the market is going up, investors want to get in on the potential profits
you have to be really careful if you use margin trading
also I'd recommend to keep at least 10-15% of your long term investments in a broad spectrum of small and middle cap coins (from top 200-300) that have communities and have been launched in 2012-2013
don't discuss whether they are Bitcoin competitors/businesses or not
consider them as commodities/collectibles with limited supply and with a pretty wide distribution, or if you understand derivatives - as out of the money options with no expiry
http://listosaur.com/miscellaneous/5-unusual-collectibles-soaring-value/http://www.cracked.com/article_21498_8-insanely-valuable-items-you-probably-owned-and-threw-out.htmlhttp://emgn.com/entertainment/12-bizarre-collectibles-that-are-actually-worth-money/not to regret too much