By far, the most common cause of secondary amenorrhea is pregnancy. The test you took was negative, but I would repeat it to be sure. A second common cause of secondary amenorrhea is weight loss. If you have been aggressively dieting lately, or engaging in a rigorous exercise plan, your periods can stop.
Likewise, if you made millions in 2017, whether from cryptocurrency, your job, or any other source, you are probably at the highest tax bracket, currently 39.6%. Itâs important to understand that these are just marginal rates applicable to you as an individual, and that assets (like cryptocurrency) often qualify for a better rate, known as the capital gains rate.
In or opinion, the most relevant cryptocurrencies are: Bitcoin: Bitcoin is an easy pick. It was the first major usable cryptocurrency; it has the highest market cap; its coins generally trade at the highest cost of all cryptocurrencies (about USD 225 as of June 2015, but as high as $5,000 during early September 2017).