As Individuals (natural persons):
As a natural person you can invest EUR 1,000 or resp. EUR 10,000 as a maximum, as long as you can confirm that you have freely available assets in the form of bank deposits and financial instruments of at least EUR 100,000, or that the amount of the loan does not exceed twice the amount of your average monthly net income.
As corporations:
Unlimited, but up to the maximum of financing needed.