...so I traded the 30$ calls for 60$ calls halving the position but remaining delta equivalent to the previous position.
There is no ideal way of doing this would be the conclusion from my post. Should SQ continue to rise I will miss out somewhat but if it consolidates or draws down for a while I am likely losing less knock for knock. Probably what I was musing is not feasible as it requires maintaining both delta and gamma equivalence when doing this swap.
You provided the answer to your question: "the delta is practically 98%" - so it's going to behave like long stock. What other option strategy gives you that high of a delta yet lets you book some of your profit, reducing risk? None.
In this situation, I would have taken a good look at a collar for Mar or Jun. You could have a Jun 45p/60c collar for maybe a $1 debit. With SQ at $49, you'd have $8 of upside at near term expiration.
The downside would be $1 to $5 , depending on when it drops. The reason for the $4 spread is that if there was a huge drop, the long $45 put would go to parity but your long $30 call would have decent salvage value. IOW, the downside is dependent on when and how far SQ drops.
If SQ moved up but stayed below the short call strike, at near term expiration you could roll the current near worthless collar up, locking in additional gain while extending upside profit potential.
It's not a better strategy than rolling the calls up since it limits the upside but it locks in at least $15 of the present value of your $30 call (it's a vertical of sorts). As others have suggested, choice of forward strategy depends on your outlook as well as fear and greed (R/R).