There will never be a perfect time to invest, more than likely, unless you're extremely lucky, you will buy and experience both dips and peaks. If you can afford to lose your money invest it, if you cant, don't.
At the moment prices will be lower than they have been due to people cashing in to pay for their Xmas shopping. I would expect that, and this is purely speculation, once the banks reopen, after the Xmas break, prices will probably bounce back up. But, that said, they will probably drop down again for new years/around new years due to people over spending when celebrating the date changing on the calender.
I agree. The cryptocurrency market is a market that would always have halts, pauses, surges, and everything in between. Therefore, it would actually be your call on whether you should invest or not because your goal in terms of profit and your future plans would only be dictated by you. It's just a matter of how much capital you want to shell out to be used for investment or trade in the cryptocurrency market. You just have to choose good coins to invest in to get some profit. Also, you have to check out the market trends that may affect your investments. Unfortunately, it's easier said than done, so good luck on investing!