I would like to have the following clarifications with regards to it's permissibility in the Islamic context1) Is it permissible to invest in cryptocurrencies?2) Can we invest in government bonds/trust funds in a Muslim or non Muslim country?3) Can we invest in Fixed deposits or obtain loans from non Muslim banks?4) Can we invest in venture capital schemes, whereby we invest in halaal businesses and then sell of our investment at a higher price at a later date?

1- No. On obligatory precaution basis.
2- Yes, in Non Muslim countries.
3- No. If the banks are owned 100% by Muslim individuals.
If the banks are partially or totally owned by government, then the money could be taken with the permission of Sayed, but not with the intention of loan.
4- Yes, you can