Personally I would wait to see how the hiring market forms back up before sinking the money into a ATP/CPT course. If it looks like you would need it to be competitive over the next year or two, then it may be worth sinking the cost into it. You may regret doing it now and come to find out that Regionals will keep offering to pay for it when hiring starts back up. Or when hiring starts back up having your ATP/CPT still won't make you competitive because there are a whole lot of pilots out there from failed Regionals just waiting to get hired.

An interesting point to consider though. When a regional pays for your ATP/CTP it is not totally free. You do have to pay taxes on that payment. For me that was ~$1200 come tax time that I had to pony up for that class. If you pay for that class yourself, obviously you will not owe any taxes on that. So the real cost of CTP/ATP if you pay your own way is the total cost minus the taxes you would have had to pay if you were sponsored.