As you may see that ETFs have become very popular because they attract mutual fund investors by their low cost, tax efficiency, saved features of the mutual funds and obtained flexibility of stocks. At the same time ETFs attract stock investors by their ability to diversify portfolio, simplified analysis, protection from bankruptcy. It is easy to understand why ETFs has become the most popular trading vehicle among all type investors, including large institutional investors and active traders.
Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.