Need some Help - BitShares, ICOs, Wallets

Hello everyone ,

New to the forum. Looking for some help.

A. I have decided to use Cryptocurrencies primarily for the following reasons:
1. Holding onto well known/ reputable currencies like BTC, ETH, NEO, LTC, XRP in the hopes they will inflate.
2. Buying ICOs on ERC20 - seems to be the most popular protocol now.

B. I have been reading up about DEX and the concept is very interesting, both for the low fees involved and for the added security. I am not very clear about how the wallets on Bitshares work though.

C. My current way of working is as follows:
1. Buy ETH on local platform (in the Middle East this is BitOasis)
2. Send ETH to wallet.
3. Buy ICO tokens from wallet.

D. My questions are:
1. Can I buy BTC or Ether directly on Bitshares using a debit card or a bank account?
2. Can I buy ICO tokens on the ERC20 protocol directly on Bitshares Ligth Client?
3. Can you suggest an alternative, cost effective working method to achieve what I have outline in part A?
4. Is the Bitshares wallet secure? Which currencies can be stored in the Bitshares Light Client wallet?
5. What is good alternative single point solution to store all tokens/ currencies?

Thank you in advance for your help!