Trezor hardware wallet: Easy to use, no matter how new in Bitcoin you're.
ColdCaard is currently the safest and most recommended.

read somewhere that 20% (give or take) of all bitcoin been already lost. People lost the keys, or people died, etc. As bitcoin becomes more mainstream, is it reasonable to expect that more and more bitcoins will be lost? And that even one day, all of bitcoin may be lost?

Don’t really know if it’s the impact of the halving or if it’s the institutional demand (or both) but bitcoin is behaving very strangely. The dips are happening less often and the bulls are aggressively buying up any cheaper bitcoin. Bullish. Bitcoin bounces back from a dip very quickly. Last time it went to 16k and recovered to 19900 ATH. There is high pressure from the demand side I guess.

Well, Let’s be clear, there’s NO APPS that let you mine bitcoins.

Actually, it is impossible to mine bitcoins with apps or with a computer. To mine Bitcoin you need the power of an ASIC, even multiple ASIC. These ASIC are machines made for only one job: Mining bitcoins. More ASIC you have, more Bitcoin you mine. You need a lot of calculation power, that’s why the “miners” own big factories composed of a lot of machines with the job to mine.

Bitcoin as being more successful as a gold-like store of value than as a day-to-day currency. Gold is typically assigned some value because of some properties, which are fungibility, authenticity, scarcity, divisibility, durability and transferability. I’m not mentioning its utility for jewellery of electronics because these only account for about $10 of gold’s value.

People value Bitcoin because it supposedly reproduces all of these values, in some cases out-performing gold and in others perhaps not doing as well.

The algorithm of bitcoin is set to be limited so when all bitcoin has been mined, the miners will no longer be able to receive block rewards because there are no more coins to be generated. But why this?

well, bitcoin is decentralized, so no one is governing it. It is secure and saves the value which flat can't.

I will say yes it is safe to invest in Bitcoin through.

Well, in my opinion, it will get over $20,000 in 2021 this is what I think and this is because of the recent bitcoin prices the value is going up.

what do you think about factors that influence the value of Bitcoin? If I say well it will be Mining and Trading.

Yes, I'm Agree with you. They don't have the knowledge about bitcoin so they just say what they have heard with their empty mind there is a fine line between gambling and bitcoin they just lack the basic understanding of both terms. Bitcoin Education is really important