If someone found the first six words of my electrum seed is it still safe or do you guys think I should change to a new wallet?
With the first 6 words known, there are at most 2
62 (about 4,000,000,000,000,000,000) seeds to guess. A PC that can check 1 billion seeds per second is guaranteed to find your seed in less than 120 years. While that may seem like a safe period of time, a sufficiently motivated attacker could acquire 1000x more processing power (for example) and crack your seed in less than a month.