The increasingly widespread development of the digital era has led to changes in the payment system which then affects the economic behavior of the community in line with the increase in various services that facilitate economic activity. An example is the emergence of crypto currency or Cryptocurrency as a digital currency that has almost the same function as other currencies. The thing that distinguishes this digital currency from conventional currencies in general is that it does not have a physical form of money like currency currency but only a block of data bound by a hash as validation. Although it provides a number of advantages for its users, the existence of cryptocurrencies in Indonesia itself is still experiencing pros and cons in terms of regulation and legality, especially from the point of view of Islamic law for its use. Therefore, this study was conducted to review cryptocurrencies that are widely used in transactions, especially investments from the perspective of Islamic law. This research is a qualitative library research. The data analysis technique used is descriptive-analytical with a normative juridical approach to Islamic law. Based on a number of references used in this study, it is known that investing with cryptocurrencies has a very high risk because its value can go up or down drastically and unpredictable. Meanwhile, from the point of view of Islamic sharia law, the law of this cryptocurrency transaction is haram lighairihi.

One way of conventional medicine in Indonesia is the herbal medicinal plant tobacco which is a controversial plant. However, currently, many types of businesses offer health services using alternative medicine using traditional medicine. Of course, this is contrary to the anti-tobacco campaign launched by the government and the regulations on tobacco contained in various laws and regulations. Therefore, this study aims to examine how the legal system regarding tobacco is related to conflicts of interest in tobacco use for treatment. This research is normative juridical research. Through a statutory and conceptual approach, the aim is to understand the importance of using tobacco as alternative medicine. The results of this study are that the government should make tobacco a priority for traditional medicine media and provide legality to community therapy houses because it is proven that tobacco can make a positive contribution to improving health.