Which companies make physical BTC coins?
Could you elaborate on which companies are actually manufacturing physical representations of Bitcoin, commonly referred to as "BTC coins"? As cryptocurrencies are inherently digital, it's intriguing to note that there are entities producing tangible versions of these digital assets. Are these coins merely collectibles or do they serve a functional purpose within the crypto ecosystem? Additionally, what are the security measures and authenticity checks these companies employ to ensure the legitimacy of these physical BTC coins? Understanding these details would provide valuable insight into this niche market within the broader cryptocurrency industry.