Invest for the long term
Investing over a long time horizon brings many benefits:
- Lower volatility 
- Most absolute benefits of compound investing come in later years 
- Higher tax efficiency if invested in appropriate vehicles (UK ISA, US 401k, etc.) 
- Asset price driven by “value” not “perceived value” 
- Many opportunities overlooked 
- Lower transaction fees (because it requires less active management) 
- More asset classes available 
It also comes with unique drawbacks:
- Requires nerves of steel 
- Lower liquidity 
- Lower feedback loops 
- Require more data, reasoning to support decisions 
To quote Sam Altman:
One of the few arbitrage opportunities left in the market is time. I think we have gotten really good at High-Frequency Trading, we have gotten really good at [measuring] the price of things. We have gotten worse at [measuring] the long-term value. I don't think you can go and beat the market in a lot of ways. But the one way I do is by making a long-term commitment to something. My new belief for how long I should hold stock in the best companies I invest in is forever. In a world that is increasingly focused on the tick and the quarterly revenue cycle, you should go the opposite way.
References
Sam Altman: How to Build the Future
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