If you are investing now, consider your investment for at least a 2-3 years period. Don't go for a short term.
You say you did a little business using BTC. Maybe you should just stick to it and consider it as a new opportunity to attract new customers (and so to grow your biz) it could turn into something more profitable than speculating..
seeing prices falling too much makes many bitcoin buying and selling pessimistic, but if we want to try to buy from now on gradually, maybe we can get future profit potential, and we don't feel we can save without realizing it.
because buying from a cheap price makes us able to expect a lot in the future.