Would you do the project or focus on studying?
A certificate is much more valuable in the long run compared to 'worked at startup xyz for 2 months before it folded/leveraged/pivoted’.
Yes there is a genuine fear that you might turn down a role in the next unicorn and miss out on a fortune but realistically playing the odds that the bit of paper will be worth more than an entry on your CV makes it worth sticking to your studies.
Personal experience story time: I once quit a course a few weeks away from graduating in order to take an oppurtunity that seemed to good to be true. Turns out that it was indeed too good to be true and the company folded a few years later. If I could turn back time I would do so on that one (and a few others).
FOMO and sweet whispers of untold wealth if only you get in early enough tempt many to abandon their studies.
Some times it works out, often it does not but ask yourself this - how often do startups turn in to unicorns?
Yes by passing on the offer you might miss the next Google but be guided by the statistics and acknowledge that you are still green enough to be unable to sort the wheat from the chaff.
Personal experience data point of n=1. Number of unicorns missed by passing on a job offer = 0. Number of roles that opened up because I had some piece(s) of paper that provided solid evidence of skills and abilities = 20+
YMMV