As of July 2019, $150 US is worth approximately 0.02 Bitcoin.
This is because Bitcoin is currently worth around $8,000 US. The value of Bitcoin can fluctuate quite a bit, so this number could be different in the future.
Bitcoin is a decentralized digital currency, which means it is not regulated by any government or financial institution. This also means that there are no fees associated with using Bitcoin.
However, there are some downsides to using Bitcoin. For example, it can be quite volatile, and there have been some instances of fraud associated with it.