If you want to buy Bitcoins because you understand the importance of this technology, and believe in its success, so that you're buying for the long term, anytime is a good time to buy it.

There's simply no expensive Bitcoin. 1 BTC is 1 BTC: it's 1 BTC More and more there are merchants accepting it, and a bright future awaits.

Now, if you are talking about speculation, day trade, etc, I suggest you start reading the posts here.

Welcome to our community.