A factor with bitcoin as a alternative to 'leveraged stock' is that you might also hold blockchain based cash (stablecoin such as USDC or USDC (of the two USDC is better regulated)) and even gold (PAXG or XAUt, of the two PAXG is better regulated), which opens up 24/7 trading. Recently coinbase (exchange) are paying something like 4.1% on USDC if you store the keys in their wallet. Personally however I prefer self custody of the private keys (offline cold storage) as the volatility (rewards) are sufficiently high enough as is to not have to worry/bother with 4% on perhaps 33% cash weighting (1.3% proportionate to total portfolio value).
All in blockchain is somewhat like bearer-bonds of old, where you have total control, can for instance hand someone else the private keys and control of the value is then theirs, without having to go online.
If you securely install the electrum app on a phone you can turn mobile data off, remove the SIM card, turn Airplane mode on - such that its totally disconnected, and then generate public/private keys, perhaps write those down and laminate the paper and store that somewhere safe (preferably in a fireproof box). You can then send value to those public keys and that's pretty safe for longer term storage. To be able to spend you'll need to go online and sweep the contents from the paper wallet/storage using the private key and then send that to ... wherever, such as converting it to dollars and transferring those to your regular bank account.
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