advantages
Bitcoin is considered a safe investment mainly because over time it has become so secure thanks to its SHA-256 algorithm designed by the US National Security Agency (NSA). No other cryptocurrency can claim the same security; Bitcoin's blockchain has never been hacked, and as time goes on and blocks are added, attacks become more difficult.
The supply and issuance of Bitcoin is programmed by protocol, and this predictability is an important feature. So as long as the economics of supply and demand support it, scarcity prevails.
Bitcoin is also unique and secure as private property, because once you own it and store it properly, it can't be taken away from you. It does not rely on local authorities or the legal system to protect it; Instead, it is protected by the natural incentives of network participants. Bitcoin investors should also consider that their bitcoin is safer in their Bitcoin wallet than their cash is in a remortgaged bank.
If we consider the Lindy effect, according to which the expected life of a technology is proportional to its current age, then bitcoin can be expected to exist for at least another 12 years. Also, despite being pronounced dead hundreds of times in the past, bitcoin seems to still be around, and we can expect it to have a much longer life.
If public figures, influential investors and entrepreneurs don't believe bitcoin is here to stay, they won't support it. Jack Dorsey, Elon Musk and Tesla, Michael Saylor, Ray Dalio and several other VIPs have added bitcoin to their companies' reserve assets, often replacing gold and cash reserves, in addition to owning assets in their personal portfolios.
disadvantages
Price volatility is usually seen as a major problem for potential Bitcoin investors, but many would argue that it's actually a feature rather than a mistake. First, bitcoin is still a relatively new asset, making it prone to big price swings. Price volatility has decreased over time, and that trend is expected to continue as Bitcoin matures. What's more, bitcoin's volatility is only short-term, and prices tend to rise in the long run, especially given the multi-year chart where the upward trend is evident.
Technical hurdles for new technologies are normal, and bitcoin's learning curve can be daunting for newcomers. Over time, however, it became easier to use wallets, keys, apps, and all the accessories, thanks to the company's contribution to improving usability.