Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Why would I buy a bond with a negative yield?
The question in my view is going into Opinion and economics. Why would I buy a bond with a negative yield? I guess you have answered yourself; Although the second point is more relevant for high net worth individual or large financial institutions / Governments where preserving cash is an important consideration. Currently quite a few Govt Bonds are in negative as most Govt want to encourage spending in an effort to revive economy.