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Buying Bitcoin then storing it in non custodial wallet like Electrum wallet that is free and does not need big storage space in your computer. It is available for mobile devices too.
In general, any non-custodial BTC wallet is better than custodial options, but only if certain prerequisites are met.
- That the computer or smartphone on which we will install the wallet is clean of viruses/malware, and that we do not use it for those activities that carry potential risks (cracked software, torrents, pornographic websites).
- That these devices have at least some kind of protection against the aforementioned threats, and that they are up to date regarding their operating systems.
- That whoever uses such a wallet knows the importance of a backup, and does not save it in an inappropriate way (as plain text on a computer, in the cloud or e-mail).
For someone who wants to convert all their funds into Bitcoin, all the above mentioned things are extremely important, with the note of course that volatility should always be kept in mind - because not so long ago the price of BTC exceeded $25k, and today it is close to $22K, which is not easy to accept for most beginners.