How we can make blockchain more secure

How we can make blockchain more secure

However you read the facts and motivations behind the Poly Network hack, it was still possible to remove over $600 million in cryptos without anyone being able to stop it. 

Looking at numbers like these, anyone considering putting more money in crypto must be thinking twice. It seems like a good time to look at what protections currently exist for them and what new moves are needed to make blockchain investment more secure?