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.
Cryptocurrency doesnât have its own special unique tax rate, so the amount you owe depends on factors that include what marginal tax bracket you are in, when you sold it, and how much profit you made over your cost to obtain it.