The price is going down due to a hard fork a few months back which decreased the time limit for people to 'power down' their Steem Power and turn it into 'liquid' Steem. This has had some downward pressure on the price. There are also some 'power downs' due from the big Steemit accounts held by the company founders which could drive it down further.
Generally this is seen as one of the best times to buy in cheap before the price goes back up again.
(All financial decisions should be made with careful consideration ;-) )