Current - Unicorn startup
Location - Non-banglore so cost of living is little less
2023 grad from Tier-1 (IITs) Non-circuital
Exp- 8 months+
Interned at Microsoft earlier
Current Tc- 20 lpa( 13 base, 1+1 retention bonus, 20% of base as perf bonus and 2.4 stocks paper money not much interested in it)
Ignoring the stock its 17.6

Offer - 
Edtech based startup in Bangalore, Full stack developer role
Base - 18 
Variable - 1.8 
Joining bonus -1
CTC- 20.8

I am confused, since appraisals are coming in next month so will be receiving my performance bonus and 1 retention bonus. 
Expecting good appraisals since my contributions have been great.
Have made great projects and features live in just 8 months and currently working on good projects in current org.

So, i am confused should i stay or wait since i am aiming for big tech.  I am pretty confident of my preparation.

Although hr will be coming up with an updated offer. Need help urgently in deciding.
Is the pay good or should i continue grinding and look for better opportunities since market seems to get better?