Besides the obvious (finding a business that will profit from what it does)
you need to take some extra measures when it comes to spending btc bcs
there are scammers everywhere

First of all if they accept some type of escrow this is a good sign.
Even if everything seems normal always know that if it sounds too
good to be true it most probably is a scam (eg 300% ROI in 2 days

)
I dunno, after that it's all up to your intelectual to decide what's right and wrong.