Well I think this question keeps many companies (not only startups) from moving into the US-market. Everyone is afraid, that one lawsuit can financially destroy

Well I think this question keeps many companies (not only startups) from moving into the US-market. Everyone is afraid, that one lawsuit can financially destroy the whole company. In Germany for example there are insurances, that will cover your costs of lawsuits etc. when you accidentally infringe IP / patents. They will also cover if a client sues you for lost business because your product somehow failed in a bad way. Some of them will offer worldwide coverage, but every policy will exclude US lawsuits.