Invested in btc or altcoins, having your money in traditional banks, basically you are loosing money these days.
i think invest in bitcoin is much more safe and profitable because bitcoin price rising to higher value and we do not face to any risk when we invest our money in bitcoin and i if we invest our money in bitcoin we will be get a good profit from bitcoin in the future so i think bitcoin is much more profitable currency than altcoins.
Investing money in bitcoin is not more safe than saving it because any kind of investment is risky even bitcoin is risky so i don't think we should invest all our money in bitcoin or any kind of cryptocurrencies because they are all risky so i think it is best to just do both, save and invest so we we will be safe that we have always back up.
It's called diversification of your assets.
As said that you should not put all your fruits in one basket and spread them in many baskets. This is a wise investment strategy and I also use it in the cryptocoins world as I have my money invested in ethereum, monero and dash out of which 2 have a nice spike in price recently.