Companies are concluding the economy worldwide is too unstable, so they are moving their funds to Bitcoin in order to protect it thinking on long term value. In this particular case, are they solely investing in BTC, or will customers be able to pay for their cappuccinos in Bitcoin as well?

Investing in Bitcoin is a great move from companies. However, to offer it as payment alternative to their customers is even better!

The tendency is that businesses in general start investing in Bitcoin. I don't think there are particular niches of the market to highlight right now. As we can see, Bitcoin has already went beyond the niches of informatics and technology. It's already entering the gastronomic one!