Thanks guys.
Nink - few reasons I can think about.
Firstly, I'm seriously thinking about investing in a real estate. Now, with low prices, I think that it might be a good moment to buy. But to do this I need money (and without a job I'll not get a commercial credit).
Secondly, I found yesterday a post from last year where somebody (river?) mentioned that you might lucky and your new company will pay off your loan (or part of it). Not sure if that still happens and how rare it is though.
Thirdly, I don't think that I'll become an entrepreneur but what if I change my mind (apparently bschools are good at encouraging people to start their own business)? If that's the case I might need money.
In all these scenarios I'll be slightly worse off. I.e. if I take a loan for 150k (assuming 8% interest rate, 4% loan fees, 15 years repayment time) I'll pay 118k extra. If I put 100k on a bank account (assuming 4% interest rate) I'll earn 80k over 15 years. So, over 15 years, I'm "losing" 38k or 2.5k per year (over 15 years). But isn't the potential upside from a real estate investment (20% over 15 yeras?) or starting you own company or just being repaid by a new employer worth the risk?