Hi, first time posting on FT

Just received email from Altitude that offers me an upgrade from P25 to E35 for 779CAD+ tax.

Does it worth the $$ to do so?

So far I am not quite sure about my travel plan this year. Maybe 1-2 long haul trips from YHZ to Asia or Europe from Sep to December, and 1-2 short haul trips in NA

im also 3k Miles away from united premier silver next year. Should I accumulate on united instead?