High risk — effectively a deprecated chain superseded by Sonic, with near-total TVL collapse, bridge exploit history, and ongoing migration that renders remaining Fantom positions increasingly risky.
Top Risks
1
Ecosystem effectively abandoned — Fantom has been superseded by Sonic (launched January 2025), with FTM migrating 1:1 to S tokens. Remaining Fantom TVL has collapsed to approximately $4.3M from a peak of $7.5B, representing near-total capital flight
2
Multichain bridge exploit in July 2023 caused $126M+ in losses across the Fantom ecosystem, devastating bridged asset liquidity and triggering an ecosystem-wide TVL collapse that the network never recovered from
3
Network superseded by successor — the Fantom Foundation has shifted all development resources to Sonic, making Fantom a legacy chain with no meaningful ongoing development or feature updates
4
FTM token deprecation — the FTM token is being migrated to Sonic (S) via 1:1 swap, meaning FTM on Fantom mainnet is a depreciating asset as holders transition to the new chain
Risk Breakdown
Frequently Asked Questions
Is Fantom safe to use?
Fantom receives a C risk grade (46/100) from Hindenrank, where lower scores indicate lower risk. High risk — effectively a deprecated chain superseded by Sonic, with near-total TVL collapse, bridge exploit history, and ongoing migration that renders remaining Fantom positions increasingly risky. Fantom is a legacy Layer 1 blockchain that has been superseded by Sonic, its successor chain launched in January 2025. Originally built on the Lachesis aBFT consensus engine, Fantom peaked at $7.5B in TVL during the 2021-2022 DeFi boom but suffered devastating blows including the Multichain bridge exploit ($126M+ lost in July 2023) and Andre Cronje's temporary departure. With TVL collapsed to approximately $4.3M and the FTM token migrating 1:1 to Sonic (S), Fantom is effectively a deprecated chain. Its D+ grade reflects the near-total ecosystem abandonment, bridge exploit history, and legacy chain risk, despite the absence of protocol-level consensus exploits.
What are the main risks of using Fantom?
The key risks identified for Fantom are: (1) Fantom is a deprecated chain — the Fantom Foundation has shifted all development to Sonic, and FTM tokens are being migrated 1:1 to Sonic (S) tokens, making Fantom Opera a legacy network with declining support (2) The Multichain bridge exploit in July 2023 drained $126M+ from the Fantom ecosystem, collapsing bridged asset liquidity and triggering an irreversible TVL decline (3) Only approximately $4.3M in TVL remains on the legacy chain, with minimal transaction activity and declining validator participation (4) Users with FTM locked in DeFi contracts on the legacy chain face potential stranding if protocols wind down without adequate migration pathways
What is Fantom's risk score breakdown?
Fantom scores 46/100 across eight risk dimensions: Mechanism Novelty: 3/15, Interaction Severity: 8/20, Oracle Surface: 0/10, Documentation Gaps: 6/10, Track Record: 12/15, Scale Exposure: 5/10, Regulatory Risk: 2/10, Vitality Risk: 10/10. The highest risk area is Vitality Risk at 10/10.
How does Fantom compare to other L1 protocols?
Among 56 rated L1 protocols on Hindenrank, Fantom ranks #49 by safety (lowest risk score = safest). Its 46/100 risk score and C grade place it among the riskier L1 protocols.
Has Fantom ever been hacked or exploited?
Fantom scores 12/15 on the Track Record risk dimension, indicating some history of security incidents or exploits. Higher scores reflect more severe or frequent incidents. Review the full risk report for details.