Used for illegal activities
Illicit use decreasing; cash more common
Vulnerable to government crackdowns
Decentralized nature makes complete shutdown difficult
High energy consumption
Incentivizes renewable energy adoption
Centralization of mining
Ongoing efforts to improve mining decentralization
Quantum computing threat
Post-quantum cryptography solutions being developed
Energy-intensive proof-of-work
Incentivizes use of stranded and excess energy sources
Lack of customer support
Growing ecosystem of support services and communities
Not backed by tangible assets
Derives value from network effects and limited supply
Deflationary nature
Encourages saving and long-term investment
No intrinsic value
Value from utility scarcity and network effects
Lack of reversibility
Feature for preventing fraud and double-spending
No consumer protection
Feature for financial sovereignty
Complex for average users
User-friendly wallets and interfaces being developed
Too complex for mainstream adoption
User-friendly interfaces and education improving accessibility
Will be banned
Difficult to suppress; trend towards regulation
Not widely accepted as payment
Increasing merchant adoption and payment processors
Can't scale
Layer 2 solutions being developed
Ponzi scheme
Decentralized system with no central authority profiting
Can be divided infinitely
CIA Created Bitcoin
They paid Gavin Andresen to give a presentation in 2013
Limited real-world adoption
Growing acceptance by merchants and institutions
Lack of centralized control
Feature for decentralization and censorship resistance
Environmental concerns
Increasing use of renewable energy in mining
Regulatory uncertainty
Increasing clarity as governments develop frameworks
It's a bubble
Resilient through multiple cycles
Slow transaction times
Lightning Network and other Layer 2 solutions improving speed
Vulnerable to 51% attack
Increasingly difficult due to network size and distribution
No fundamental value
Value derived from scarcity, security, and network effects
Too volatile
Volatility decreasing with adoption
Limited privacy
Privacy coins and Layer 2 solutions addressing this issue
Can be hacked
Core protocol secure; proper storage prevents theft
Will be replaced
First-mover advantage; continuous improvement