Congrats. As I am sure you are aware you will have no more amount of stock money wise split or no split. Never understood why stocks run up like that after announcing a split but some do and you capitalized. I am not the one to tell or suggest what you should do. I tend to invest more than trade now and I can't see owning Tesla when it is worth as much as every other car company combined, and they do not even make any money selling their cars. We can quibble about the earnings reports, but those profits are from energy credits, not car sales. Be that as it may you have a good profit and no one ever went broke taking a profit.
For future reference it is a 5 for 1 split, meaning you get 5 for every 1 you own. A 1 for 5 split would mean you would get 1 share for every 5 you own. That is done to shrink the float and increase a stock price so a company can remain listed and typically occurs just before a company is going out of business.