For example the $500 call options on TSLA which expire on Friday. They were on-sale all month, giving you the option to buy a share of TSLA at $500 up until this Friday.
Today they were selling for ~$85/share. But on Jan 1 they were selling for ~$5/share, and tomorrow morning it looks like they will be worth maybe $150/share.
30x in a month for a True Believer -- sure wish I had done it!
[1] - https://www.marketwatch.com/investing/stock/tsla/option/TSLA...