It's reasonable. 5 posts to various topics, be constructive or not is fairly quick to do. Browse 4 hours? If I'd registered the first time I visited bitcointalk.org, it would easily be 30+ hours, so again it seems reasonable.
Was setting up a mining operation, and for a period BTC was the most profitable to mine. But other than that, I like to keep my virtual money in a few different crypto currencies to minimize the risk.
Might as well get used to it, BTC is a relatively low volume compared to what is being traded on other exchanges, so the price will be much less stable.