"The market can remain irrational longer than you can remain solvent."
Perhaps, consider deleveraging as TSLA goes up. Down to 100% of your life savings, perhaps. If you have income coming in you can deleverage simply by depositing it as it comes in to pay down your margin loans (i.e. increasing your life savings but not increasing your investment).
Or if you want to stay leveraged, you can switch out of margin loans into long-dated deep-in-the-money LEAPS, as GoTslaGo described. Basically you can put "half down" and be 200% invested without paying much in the way of interest (though effectively you pay some interest upfront), and you're more protected in case of crazy downside possibilities like Musk dying in a rocket explosion. With margin loans, if the stock goes south, you can end up owing more than your savings and having to sell your house and car and declare bankruptcy, which is a scenario I don't even want a tiny risk of.
I see from another comment that you don't want to sell the stock because you don't want to pay the short-term CG taxes... OK then! Have you done your best to minimize the interest rate you're paying by shopping around for different sources of loans? You can move the stock directly from one broker to another (one might offer better margin loan rates), you can see if you can refinance the margin loan using some other sort of loan which is cheaper (though that's unlikely... maybe you have a house you can get a mortgage on?), etc...
It should.