Not all wall street firms end up success, many were bankrupt, but you won't hear the bankrupt story. The higher the leverage, the higher the bankruptcy risk. And for sure, real estate business has the highest leverage across industries IIRC. What I want to say is, you don't always need leverage. You can be wealthy from side hustle without borrowing any money. The key is reinvesting your excess income, not from debt.
But what if the income that you have monthly is not even enough for your family's daily needs and you want to invest in order to gain more income? The only way is to borrow but you should use or invest it wisely. Knowledge is very important and your strategy to gain profit.
By definition, people who do not have enough money to meet their family's daily
needs do not seem to be in a place to invest.
On the other hand, if such a person is able to get their finances in order sufficiently to build an emergency fund, then thereafter s/he may be able to start to invest after that... so even $1 per day.. or some other modest amount could be put into BTC.. so long as s/he is not going to need the money for several years 4-10 years or more.
Also, seems to me that the use of debt has to be employed strategically too.. so most of the time, servicing debt costs money, so if a person is either not meeting his/her needs, or barely meeting his/her needs, s/he might not be in a position to try to use debt. From my consideration, there needs to be some realistic calculations about whether the amount of extra cost for the debt is going to pay for itself.. so if the money has considerable assurances to return more than it costs to service the debt, then it may well be a strategically beneficial move to take on the debt, and for sure, I had already mentioned that there should be some ability to pay back the debt, even if the investment does not play out in an advantageous direction.. .. and yeah, figuring out ways to meet basic needs by increasing income or decreasing expenses are fundamental starting points too... and surely if income can be increased or expenses can be decreased, then there might end up being more money to set aside an emergency fund and then be in a position to invest and/or to take on a loan/debt for such purposes.