Following are the disadvantages: of bitcoins.

Degree of Acceptance: In Bitcoin, the Degree of Acceptance is very low because many people are still unaware of its benefits.
Volatile: Total number of Bitcoins in circulation is very small, so even a small change can make the price of the Bitcoin volatile.
Ongoing Development: Bitcoins software is still in beta form, and many incomplete features are in active development

As of my last knowledge update in January 2022, Bitcoin has both advantages and disadvantages. Keep in mind that the cryptocurrency space is dynamic, and developments may have occurred since then. Here are some potential disadvantages of Bitcoin:

Volatility: Bitcoin is known for its price volatility. While this can present opportunities for traders, it also poses risks for investors as the value can fluctuate significantly over short periods.
Lack of Regulation: The lack of regulatory oversight can lead to concerns about fraud, market manipulation, and security breaches. Investors may have limited recourse in the event of malfeasance.
Security Risks: Although the blockchain technology underlying Bitcoin is considered secure, the ecosystem around it, including exchanges and wallets, may be vulnerable to hacking and cyber attacks.
Irreversibility of Transactions: Once a Bitcoin transaction is confirmed, it is irreversible. This lack of a chargeback mechanism can be a disadvantage in situations of fraud or accidental transactions.
Scalability Issues: Bitcoin’s transaction processing capability is limited by its block size and block time, potentially leading to slower transaction times and higher fees during periods of high demand.
Energy Consumption: The process of mining, which is essential to validate and add transactions to the blockchain, requires a significant amount of computational power and energy. This has led to concerns about the environmental impact of Bitcoin mining.
Limited Acceptance: While the acceptance of Bitcoin is growing, it is not universally recognized as a legal form of currency, and not all businesses accept it as a means of payment.
Anonymity Concerns: While Bitcoin transactions are recorded on the blockchain, the level of anonymity they provide has raised concerns about their potential use in illegal activities.
Technological Risks: As technology evolves, there may be unforeseen vulnerabilities or challenges that could impact the security and stability of Bitcoin.

It’s important to note that the cryptocurrency landscape is continually evolving, and developments may have occurred since my last update. Additionally, the perception of these disadvantages can vary among individuals and stakeholders in the financial and technological sectors.