How safe is it?
Yes it's good.to invest in bitcoin but to think that is safe no one know what will soon to happen so I cannot answer it . scare of investment will not get you rich. And one more thing bitcoin it self is an investment another thing you can use bitcoin in many investment trading,gambling,lending and many more so don't be scared if the price will increase decrease just invest what you can afford to lose.
If you believe the bitcoin price will rise in the next few decades, it is better to buy some bitcoin now and hold.
yeah you can use a lot of investment if you're using bitcoin there are many methods you can do with bitcoin including growing with a secure method. invest in bitcoin not only hold bitcoin. there are many methods other than that such trading, cloudmining, etc and so forth. buy now is not a problem because you can still grow and a profit
Yes buying bitcoin as of today would be still profitable since bitcoin has potential to increase its price on a month or in a year. Just like what you said there are lots of ways to gain profit on your bitcoin not just holding it , you can invest it so that it somehow give you profit. Do trading on altcoin, i would not suggest cloudmining its just a waste of money.
Cloud mining sometimes can be foreseen as investing in HYIP because we never know when the site will stop operating and usually when that happens they will not refund us any amount and will just disappear like a bubble.