This situation is a common concern for many parents..However, I will not make a will based solely on emotion or personal satisfaction. I will consider the long term reality and fairness. However, I think that giving all the assets to one child completely can cause family conflict in the future. Again, if any of the children do not understand the value of the assets, then dividing them equally can be a kind of risk. So thinking about a middle ground between these two issues can be the real solution.
Since you mentioned the issue of digital assets like Bitcoin. In that case, it would not be bad to have clear instructions in the will. What I really want to say is that it is a matter of trustees. To arrange for access after meeting certain time and conditions under the supervision of a trusted third party. In this, the responsible child will be able to lead in managing the assets. Again, others will not be deprived of their fair share.
This is fair enough and not biased, because being biased in this situation will make the rest children feel they are not loved, without them realizing they are the issue.
This idea of yours is also good because it will also help the two children who are irresponsible to sit up, amend their ways and become responsible since they all want to achieve a valuable asset that will help their lives in the future.