I would say buy low and trade btc. Use the markets and play futures and options to increase your btc. This is my plan to get rich. Options trading. Vanilla and Binary options!
This strategy will never work with Bitcoin, because it is such a volatile currency. After Bitcoin crashed to $300 from $1,000 in just three months, a lot of people started accumulating it. But the problem is that, even after 18 months, Bitcoin hasn't recovered to the pre-crash peaks. The exchange rate is going at $220-240 right now.
It's because of this volatility why it does work and is pretty easy to make a nice profit, but not enough to get rich off for sure. That would only happen if we saw some wild swings again but bitcoin hasn't really been shooting up like it did back in 2013. I think it'll be more likely to grow steadily over time but could be waiting a while.