It's right there, many big companies already have their offices there, English is the official spoken language, it is basically a far as uk to reach from the point of view of any European citizen, and it is cheaper (I guess).
Taxation is lower BUT actually enforced: there is no such thing as City of London corporation, isle of man or crap like that.
I guess it is less "developed" than London, but becoming the next European tech hub might be a great drive for development.
For example, bus/subway stops are only announced in German, not in English.
In Milan, Italy, bus and subway stops are announced in both Italian and English, public transport works very well in my opinion.
It's a pity that doing business in Italy is basically a rat race, taxation is ridiculously high (compared to the services and services level you get) and there is a crazy bureaucracy, otherwise Milan would be an awesome place for a tech hub.
The ticket machines are really simple, select region, select type of ticket and input money, how badly can they translate it?
As for the bus/subway, they stops are announced in German, but how hard is it to figure out "Nächste Station," and even in more complicated cases you can pick up the few words you need to understand. Even the hobos speak English.
Startup meetups, events, investor talks all happen in English, I work in a company where the official language is English, as is in most larger IT companies.
For basic communication you should also put in a little effort to learn a few German phrases (which is the polite thing to do) for necessities, and you'll have no problems.
Well, yeah -- it's like, a foreign country, you know.
If you live in one of the large cities (particular one of those that are used to welcoming tourists) and mostly deal with young people from the tech industry you'll be able to get along without ever having to speak a word of German.
Signage - particularly in small towns that are not used to foreigners - will be in German exclusively but to understand those a little bit of tourist German will be sufficient.
That said, what's so bad about learning another language? It'll broaden your mind and teach you a thing or two about another culture. Besides, learning German isn't all that difficult for a native English speaker (perfecting it probably takes a very long time but nobody will expect you to be perfect).
What you can't do without German is to integrate in the society. Which is pretty tough even if you speak German. Without it you're basically disconnected.