Does it still make sense to DCA into this stock if it has risen 40%?

Firstly, need to see your risk appetite. Starting with DCA is a good point, but do avoid DCA via traditional plans like OCBC Blue Chip Investment Plan (BCIP), as they are regarded to buy in on 22nd of each month, hence the buy-in price will be manipulated by other players to jack up prices.

That being said, DCA is still okay for 40% difference, just dilute with 6 months DCA along the way and you should be fine !

To give your my perspective, I am adding Tesla from 500 till recent high at 800, and will continue DCA for the foreseeable future.

note: I am doubtful that tiger intrinsic value is 100, perhaps double check your calculation.