If you buy for long-term investments, you can take it at any time. But it's better to always diversify the risks, so consider the option of dividing your deposit into several crypto-currencies. And so, in the next few years, this market will only grow, invest more boldly. All in your hands.
Like all bitcoiners and realists, I will also speak the truth. Bitcoin is the most beneficial investment at current because of the progress it has shown in past few years. As it has also produced some millionaire which increases our trust in this coin and, motivation of becoming one of them! Yup, bitcoin is the biggest bubble of this generation and a future maker.