There's currently no hard cap on the supply of OBOS token, making it an inflationary token.
Community members often point to this as a cause for concern, and while the chefs certainly understand the wish for a hard cap, there's a big reason we don't expect to set one in the near future:
OBO's primary function is to incentivize providing liquidity to the exchange. Without block rewards, there would be much less incentive to provide liquidity (LP fees etc. would remain).
Regular token burns are built into many of Obo Swap's products with more on the way. Check the OBOS Tokenomics page for details on present and upcoming deflationary mechanisms..