Many crypto projects have stopped due to lack of funds and due to the search for available members for their project or to be a team in their project in the development of a crypto project is not just because it still needs to improve their papers. so that they can sell the coin in their presale but it is not just because instructions are followed before issuing a presale in their project.
Cryptocurrency market falled from 2018. So team of the projects lost their money because fall of the cryptocurrency rates. Developments take time and money and it is very difficult to develop a project when the whole cryptocurrency market falls.
Now cryptocurrency market raise and situation is different. But it is necessary check the team before investing and check everything - the security of the platform, MVP and many other things. Here information about this
https://bamboodefi.medium.com/.
Remember that all investments need a carefully study

You have to be honest, those projects who really started working in 2018 they did at least something, but 90-95 percent just raised money and did nothing! Therefore, I must agree with you that security in cryptocurrency is very important!