Not a safe bet at all. With so much influence from banks, investors, and company owners about the livelihood of bitcoin and all alt coins in the news, I think the price will begin to fluctuate even more the way we see in the stock markets. At this very moment, Dec 22 11:00 am EST, BTC is at $13,200. That is a big drop from a few days ago like, Friday, Dec 16 at 11:00 pm EST at a high $19,390. I think people who had bitcoins were starting to get scared and cashed in on their winnings right away. Now that it is going down, many more new investors will buy in to bitcoin in hopes of cashing in on the rise of its price again. And so goes the cycle of buying low and selling high, the way the stock market is.
I think many more people will begin to see the potential of all altcoins as a way to make money buy investing in cryptocurrency similar to the way the stock market works.
I just saw an article about Goldman Sachs creating a trading platform for bitcoins. Soon many more banks and investing firms will follow suit.